travis: install rpm

- Added some tests to make sure stores do not enforce their own naming.
- Improve recipient structured logging.

.gitignore

@@ -25,10 +25,13 @@ _testmain.go
 *.swp
 *.swo
 
-# our binary
+# our binaries
+/client
+/client.exe
 /inbucket
 /inbucket.exe
-/target/**
-
-# local goxc config
-.goxc.local.json
+/dist/**
+/cmd/client/client
+/cmd/client/client.exe
+/cmd/inbucket/inbucket
+/cmd/inbucket/inbucket.exe

.goreleaser.yml

@@ -0,0 +1,80 @@
+project_name: inbucket
+
+release:
+  github:
+    owner: jhillyerd
+    name: inbucket
+  name_template: '{{.Tag}}'
+
+brew:
+  commit_author:
+    name: goreleaserbot
+    email: goreleaser@carlosbecker.com
+  install: bin.install ""
+
+builds:
+  - binary: inbucket
+    goos:
+      - darwin
+      - freebsd
+      - linux
+      - windows
+    goarch:
+      - amd64
+    goarm:
+      - "6"
+    main: ./cmd/inbucket
+    ldflags: -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}
+  - binary: inbucket-client
+    goos:
+      - darwin
+      - freebsd
+      - linux
+      - windows
+    goarch:
+      - amd64
+    goarm:
+      - "6"
+    main: ./cmd/client
+    ldflags: -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}
+
+archive:
+  format: tar.gz
+  wrap_in_directory: true
+  name_template: '{{ .Binary }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}{{ if .Arm }}v{{
+    .Arm }}{{ end }}'
+  format_overrides:
+    - goos: windows
+      format: zip
+  files:
+    - LICENSE*
+    - README*
+    - CHANGELOG*
+    - etc/**/*
+    - ui/**/*
+
+nfpm:
+  vendor: inbucket.org
+  homepage: https://www.inbucket.org/
+  maintainer: github@hillyerd.com
+  description: All-in-one disposable webmail service.
+  license: MIT
+  formats:
+    - deb
+    - rpm
+  files:
+    "ui/**/*": "/usr/local/share/inbucket/ui"
+  config_files:
+    "etc/linux/inbucket.service": "/lib/systemd/system/inbucket.service"
+    "ui/greeting.html": "/etc/inbucket/greeting.html"
+
+snapshot:
+  name_template: SNAPSHOT-{{ .Commit }}
+
+checksum:
+  name_template: '{{ .ProjectName }}_{{ .Version }}_checksums.txt'
+
+dist: dist
+
+sign:
+  artifacts: none

.goxc.json

@@ -1,18 +0,0 @@
-{
-	"ArtifactsDest": "target",
-	"TasksExclude": [
-		"pkg-build"
-	],
-	"Arch": "amd64",
-	"Os": "darwin freebsd linux windows",
-	"ResourcesInclude": "README*,LICENSE*,CHANGELOG*,inbucket.bat,etc,themes",
-	"PackageVersion": "1.2.0",
-	"PrereleaseInfo": "rc1",
-	"ConfigVersion": "0.9",
-	"BuildSettings": {
-		"LdFlagsXVars": {
-			"TimeNow": "main.BUILDDATE",
-			"Version": "main.VERSION"
-		}
-	}
-}

.travis.yml

@@ -1,9 +1,24 @@
 language: go
 sudo: false
 
+addons:
+  apt:
+    packages:
+      - rpm
+
+env:
+  - DEPLOY_WITH_MAJOR="1.10"
+
 before_script:
-  - go vet ./...
+  - go get github.com/golang/lint/golint
+  - make deps
 
 go:
-  - 1.7.5
-  - master
+  - "1.10.1"
+
+deploy:
+  provider: script
+  script: etc/travis-deploy.sh
+  on:
+    tags: true
+    branch: master

CHANGELOG.md

@@ -4,8 +4,86 @@ Change Log
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-[1.2.0-rc1] - 2017-01-29
-------------------------
+## [2.0.0-rc1] - 2018-04-07
+
+### Added
+- Inbucket is now configured using environment variables instead of a config
+  file.
+- In-memory storage option, best for small installations and desktops.  Will be
+  used by default.
+- Storage type is now displayed on Status page.
+- Store size is now calculated during retention scan and displayed on the Status
+  page.
+- Debian `.deb` package generation to release process.
+- RedHat `.rpm` package generation to release process.
+- Message seen flag in REST and Web UI so you can see which messages have
+  already been read.
+- Recipient domain accept policy; Inbucket can now reject mail to specific
+  domains.
+- Configurable support for identifying a mailbox by full email address instead
+  of just the local part (username).
+- Friendly URL support: `<inbucket-url>/<mailbox>` will redirect your browser to
+  that mailbox.
+
+### Changed
+- Massive refactor of back-end code.  Inbucket should now be both easier and
+  more enjoyable to work on.
+- Changes to file storage format, will require pre-2.0 mail store directories to
+  be deleted.
+- Renamed `themes` directory to `ui` and eliminated the intermediate `bootstrap`
+  directory.
+- Docker build:
+  - Uses the same default ports as other builds; smtp:2500 http:9000 pop3:1100
+  - Uses volume `/config` for `greeting.html`
+  - Uses volume `/storage` for mail storage
+- Log output is now structured, and will be output as JSON with the `-logjson`
+  flag; which is enabled by default for the Docker container.
+- SMTP and POP3 network tracing is no longer logged regardless of level, but can
+  be sent to stdout via `-netdebug` flag.
+- Replaced store/nostore config variables with a storage policy that mirrors the
+  domain accept policy.
+
+### Removed
+- No longer support SIGHUP or log file rotation.
+
+
+## [v1.3.1] - 2018-03-10
+
+### Fixed
+- Adding additional locking during message delivery to prevent race condition
+  that could lose messages.
+
+
+## [v1.3.0] - 2018-02-28
+
+### Added
+- Button to purge mailbox contents from the UI.
+- Simple HTML/CSS sanitization; `Safe HTML` and `Plain Text` UI tabs.
+
+### Changed
+- Reverse message display sort order in the UI; now newest first.
+
+
+## [v1.2.0] - 2017-12-27
+
+### Changed
+- No significant code changes from rc2
+
+### Added
+- `rest/client` types `MessageHeader` and `Message` with convenience methods;
+  provides a more natural API
+- Powerful command line REST
+  [client](https://github.com/jhillyerd/inbucket/wiki/cmd-client)
+- Allow use of `latest` as a message ID in REST calls
+
+### Changed
+- `rest/client.NewV1` renamed to `New`
+- `rest/client` package now embeds the shared `rest/model` structs into its own
+  types
+- Fixed panic when `monitor.history` set to 0
+
+
+## [v1.2.0-rc1] - 2017-01-29
 
 ### Added
 - Storage of `To:` header in messages (likely breaks existing datastores)
@@ -31,8 +109,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Allow increased local-part length of 128 chars for Mailgun
 - RedHat and Ubuntu now use systemd instead of legacy init systems
 
-[1.1.0] - 2016-09-03
---------------------
+
+## [v1.1.0] - 2016-09-03
 
 ### Added
 - Homebrew inbucket.conf and formula (see README)
@@ -40,8 +118,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 - Log and continue when unable to delete oldest message during cap enforcement
 
-[1.1.0-rc2] - 2016-03-06
-------------------------
+
+## [v1.1.0-rc2] - 2016-03-06
 
 ### Added
 - Message Cap to status page
@@ -51,8 +129,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Shutdown hang in retention scanner
 - Display empty subject as `(No Subject)`
 
-[1.1.0-rc1] - 2016-03-04
-------------------------
+
+## [v1.1.0-rc1] - 2016-03-04
 
 ### Added
 - Inbucket now builds with Go 1.5 or 1.6
@@ -66,8 +144,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - RESTful API moved to `/api/v1` base URI
 - More graceful shutdown on Ctrl-C or when errors encountered
 
-[1.0] - 2014-04-14
-------------------
+
+## [v1.0] - 2014-04-14
 
 ### Added
 - Add new configuration option `mailbox.message.cap` to prevent individual
@@ -75,28 +153,31 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Add Link button to messages, allows for directing another person to a
   specific message.
 
-[Unreleased]: https://github.com/jhillyerd/inbucket/compare/master...develop
-[1.2.0-rc1]:  https://github.com/jhillyerd/inbucket/compare/1.1.0...1.2.0-rc1
-[1.1.0]:      https://github.com/jhillyerd/inbucket/compare/1.1.0-rc2...1.1.0
-[1.1.0-rc2]:  https://github.com/jhillyerd/inbucket/compare/1.1.0-rc1...1.1.0-rc2
-[1.1.0-rc1]:  https://github.com/jhillyerd/inbucket/compare/1.0...1.1.0-rc1
-[1.0]:        https://github.com/jhillyerd/inbucket/compare/1.0-rc1...1.0
+[Unreleased]:  https://github.com/jhillyerd/inbucket/compare/master...develop
+[v2.0.0-rc1]:  https://github.com/jhillyerd/inbucket/compare/v1.3.1...v2.0.0-rc1
+[v1.3.1]:      https://github.com/jhillyerd/inbucket/compare/v1.3.0...v1.3.1
+[v1.3.0]:      https://github.com/jhillyerd/inbucket/compare/v1.2.0...v1.3.0
+[v1.2.0]:      https://github.com/jhillyerd/inbucket/compare/1.2.0-rc2...1.2.0
+[v1.2.0-rc2]:  https://github.com/jhillyerd/inbucket/compare/1.2.0-rc1...1.2.0-rc2
+[v1.2.0-rc1]:  https://github.com/jhillyerd/inbucket/compare/1.1.0...1.2.0-rc1
+[v1.1.0]:      https://github.com/jhillyerd/inbucket/compare/1.1.0-rc2...1.1.0
+[v1.1.0-rc2]:  https://github.com/jhillyerd/inbucket/compare/1.1.0-rc1...1.1.0-rc2
+[v1.1.0-rc1]:  https://github.com/jhillyerd/inbucket/compare/1.0...1.1.0-rc1
+[v1.0]:        https://github.com/jhillyerd/inbucket/compare/1.0-rc1...1.0
 
 
-Release Checklist
------------------
+## Release Checklist
 
 1.  Create release branch: `git flow release start 1.x.0`
 2.  Update CHANGELOG.md:
-  - Ensure *Unreleased* section is up to date
-  - Rename *Unreleased* section to release name and date.
-  - Add new GitHub `/compare` link
-3.  Update goxc version info: `goxc -wc -pv=1.x.0 -pr=snapshot`
-4.  Run: `goxc interpolate-source` to update VERSION var
-5.  Run tests
-6.  Test cross-compile: `goxc`
-7.  Commit changes and merge release: `git flow release finish 1.x.0`
-8.  Upload to bintray: `goxc bintray`
-9.  Update `binary_versions` option in `inbucket-site/_config.yml`
+    - Ensure *Unreleased* section is up to date
+    - Rename *Unreleased* section to release name and date.
+    - Add new GitHub `/compare` link
+3.  Run tests
+4.  Test cross-compile: `goreleaser --snapshot`
+5.  Commit changes and merge release: `git flow release finish`
+6.  Push tags and wait for https://travis-ci.org/jhillyerd/inbucket build to
+    complete
+7.  Update `binary_versions` option in `inbucket-site/_config.yml`
 
 See http://keepachangelog.com/ for additional instructions on how to update this file.

CONTRIBUTING.md

@@ -4,6 +4,8 @@ How to Contribute
 Inbucket encourages third-party patches. It's valuable to know how other
 developers are using the product.
 
+**tl;dr:** File pull requests against the `develop` branch, not `master`!
+
 
 ## Getting Started
 

Dockerfile

@@ -1,25 +1,43 @@
-# Docker build file for Inbucket, see https://www.docker.io/
-# Inbucket website: http://www.inbucket.org/
+# Docker build file for Inbucket: https://www.inbucket.org/
 
-FROM golang:1.7-alpine
-MAINTAINER James Hillyerd, @jameshillyerd
+# Build
+FROM golang:1.10-alpine as builder
+RUN apk add --no-cache --virtual .build-deps git make
+WORKDIR /go/src/github.com/jhillyerd/inbucket
+COPY . .
+ENV CGO_ENABLED 0
+RUN make clean deps
+RUN go build -o inbucket \
+  -ldflags "-X 'main.version=$(git describe --tags --always)' -X 'main.date=$(date -Iseconds)'" \
+  -v ./cmd/inbucket
 
-# Configuration (WORKDIR doesn't support env vars)
-ENV INBUCKET_SRC $GOPATH/src/github.com/jhillyerd/inbucket
-ENV INBUCKET_HOME /opt/inbucket
-WORKDIR $INBUCKET_HOME
-ENTRYPOINT ["/con/context/start-inbucket.sh"]
-CMD ["/con/configuration/inbucket.conf"]
+# Run in minimal image
+FROM alpine:3.7
+ENV SRC /go/src/github.com/jhillyerd/inbucket
+WORKDIR /opt/inbucket
+RUN mkdir bin defaults ui
+COPY --from=builder $SRC/inbucket bin
+COPY etc/docker/defaults/greeting.html defaults
+COPY ui ui
+COPY etc/docker/defaults/start-inbucket.sh /
+
+# Configuration
+ENV INBUCKET_SMTP_DISCARDDOMAINS bitbucket.local
+ENV INBUCKET_SMTP_TIMEOUT 30s
+ENV INBUCKET_POP3_TIMEOUT 30s
+ENV INBUCKET_WEB_GREETINGFILE /config/greeting.html
+ENV INBUCKET_WEB_COOKIEAUTHKEY secret-inbucket-session-cookie-key
+ENV INBUCKET_STORAGE_TYPE file
+ENV INBUCKET_STORAGE_PARAMS path:/storage
+ENV INBUCKET_STORAGE_RETENTIONPERIOD 72h
+ENV INBUCKET_STORAGE_MAILBOXMSGCAP 300
 
 # Ports: SMTP, HTTP, POP3
-EXPOSE 10025 10080 10110
+EXPOSE 2500 9000 1100
 
-# Persistent Volumes, following convention at:
-#   https://github.com/docker/docker/issues/9277
-# NOTE /con/context is also used, not exposed by default
-VOLUME /con/configuration
-VOLUME /con/data
+# Persistent Volumes
+VOLUME /config
+VOLUME /storage
 
-# Build Inbucket
-COPY . $INBUCKET_SRC/
-RUN "$INBUCKET_SRC/etc/docker/install.sh"
+ENTRYPOINT ["/start-inbucket.sh"]
+CMD ["-logjson"]

Makefile

@@ -0,0 +1,40 @@
+SHELL = /bin/sh
+
+SRC := $(shell find . -type f -name '*.go' -not -path "./vendor/*")
+PKGS := $(shell go list ./... | grep -v /vendor/)
+
+.PHONY: all build clean fmt lint reflex simplify test
+
+commands = client inbucket
+
+all: clean test lint build
+
+$(commands): %: cmd/%
+	go build ./$<
+
+clean:
+	go clean $(PKGS)
+	rm -f $(commands)
+	rm -rf dist
+
+deps:
+	go get -t ./...
+
+build: $(commands)
+
+test:
+	go test -race ./...
+
+fmt:
+	@gofmt -l -w $(SRC)
+
+simplify:
+	@gofmt -s -l -w $(SRC)
+
+lint:
+	@test -z "$(shell gofmt -l . | tee /dev/stderr)" || echo "[WARN] Fix formatting issues with 'make fmt'"
+	@golint -set_exit_status $(PKGS)
+	@go vet $(PKGS)
+
+reflex:
+	reflex -r '\.go$$' -- sh -c 'echo; date; echo; go test ./... && echo ALL PASS'

README.md

@@ -21,6 +21,9 @@ to contribute code to the project check out [CONTRIBUTING.md].
 
 ## Homebrew Tap
 
+(currently broken, being tracked in [issue
+#68](https://github.com/jhillyerd/inbucket/issues/68))
+
 Inbucket has an OS X [Homebrew] tap available as [jhillyerd/inbucket][Homebrew Tap],
 see the `README.md` there for installation instructions.
 
@@ -31,7 +34,7 @@ You will need a functioning [Go installation][Google Go] for this to work.
 
 Grab the Inbucket source code and compile the daemon:
 
-    go get -v github.com/jhillyerd/inbucket
+    go get -v github.com/jhillyerd/inbucket/cmd/inbucket
 
 Edit etc/inbucket.conf and tailor to your environment.  It should work on most
 Unix and OS X machines as is.  Launch the daemon:

cmd/client/list.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+
+	"github.com/google/subcommands"
+	"github.com/jhillyerd/inbucket/pkg/rest/client"
+)
+
+type listCmd struct {
+	mailbox string
+}
+
+func (*listCmd) Name() string {
+	return "list"
+}
+
+func (*listCmd) Synopsis() string {
+	return "list contents of mailbox"
+}
+
+func (*listCmd) Usage() string {
+	return `list <mailbox>:
+	list message IDs in mailbox
+`
+}
+
+func (l *listCmd) SetFlags(f *flag.FlagSet) {
+}
+
+func (l *listCmd) Execute(
+	_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
+	mailbox := f.Arg(0)
+	if mailbox == "" {
+		return usage("mailbox required")
+	}
+	// Setup rest client
+	c, err := client.New(baseURL())
+	if err != nil {
+		return fatal("Couldn't build client", err)
+	}
+	// Get list
+	headers, err := c.ListMailbox(mailbox)
+	if err != nil {
+		return fatal("REST call failed", err)
+	}
+	for _, h := range headers {
+		fmt.Println(h.ID)
+	}
+
+	return subcommands.ExitSuccess
+}

cmd/client/main.go

@@ -0,0 +1,79 @@
+// Package main implements a command line client for the Inbucket REST API
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"regexp"
+
+	"github.com/google/subcommands"
+)
+
+var host = flag.String("host", "localhost", "host/IP of Inbucket server")
+var port = flag.Uint("port", 9000, "HTTP port of Inbucket server")
+
+// Allow subcommands to accept regular expressions as flags
+type regexFlag struct {
+	*regexp.Regexp
+}
+
+func (r *regexFlag) Defined() bool {
+	return r.Regexp != nil
+}
+
+func (r *regexFlag) Set(pattern string) error {
+	if pattern == "" {
+		r.Regexp = nil
+		return nil
+	}
+	re, err := regexp.Compile(pattern)
+	if err != nil {
+		return err
+	}
+	r.Regexp = re
+	return nil
+}
+
+func (r *regexFlag) String() string {
+	if r.Regexp == nil {
+		return ""
+	}
+	return r.Regexp.String()
+}
+
+// regexFlag must implement flag.Value
+var _ flag.Value = &regexFlag{}
+
+func main() {
+	// Important top-level flags
+	subcommands.ImportantFlag("host")
+	subcommands.ImportantFlag("port")
+	// Setup standard helpers
+	subcommands.Register(subcommands.HelpCommand(), "")
+	subcommands.Register(subcommands.FlagsCommand(), "")
+	subcommands.Register(subcommands.CommandsCommand(), "")
+	// Setup my commands
+	subcommands.Register(&listCmd{}, "")
+	subcommands.Register(&matchCmd{}, "")
+	subcommands.Register(&mboxCmd{}, "")
+	// Parse and execute
+	flag.Parse()
+	ctx := context.Background()
+	os.Exit(int(subcommands.Execute(ctx)))
+}
+
+func baseURL() string {
+	return fmt.Sprintf("http://%s:%v", *host, *port)
+}
+
+func fatal(msg string, err error) subcommands.ExitStatus {
+	fmt.Fprintf(os.Stderr, "%s: %v\n", msg, err)
+	return subcommands.ExitFailure
+}
+
+func usage(msg string) subcommands.ExitStatus {
+	fmt.Fprintln(os.Stderr, msg)
+	return subcommands.ExitUsageError
+}

cmd/client/match.go

@@ -0,0 +1,164 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"net/mail"
+	"os"
+	"time"
+
+	"github.com/google/subcommands"
+	"github.com/jhillyerd/inbucket/pkg/rest/client"
+)
+
+type matchCmd struct {
+	mailbox string
+	output  string
+	outFunc func(headers []*client.MessageHeader) error
+	delete  bool
+	// match criteria
+	from    regexFlag
+	subject regexFlag
+	to      regexFlag
+	maxAge  time.Duration
+}
+
+func (*matchCmd) Name() string {
+	return "match"
+}
+
+func (*matchCmd) Synopsis() string {
+	return "output messages matching criteria"
+}
+
+func (*matchCmd) Usage() string {
+	return `match [flags] <mailbox>:
+	output messages matching all specified criteria
+	exit status will be 1 if no matches were found, otherwise 0
+`
+}
+
+func (m *matchCmd) SetFlags(f *flag.FlagSet) {
+	f.StringVar(&m.output, "output", "id", "output format: id, json, or mbox")
+	f.BoolVar(&m.delete, "delete", false, "delete matched messages after output")
+	f.Var(&m.from, "from", "From header matching regexp (address, not name)")
+	f.Var(&m.subject, "subject", "Subject header matching regexp")
+	f.Var(&m.to, "to", "To header matching regexp (must match 1+ to address)")
+	f.DurationVar(
+		&m.maxAge, "maxage", 0,
+		"Matches must have been received in this time frame (ex: \"10s\", \"5m\")")
+}
+
+func (m *matchCmd) Execute(
+	_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
+	mailbox := f.Arg(0)
+	if mailbox == "" {
+		return usage("mailbox required")
+	}
+	// Select output function
+	switch m.output {
+	case "id":
+		m.outFunc = outputID
+	case "json":
+		m.outFunc = outputJSON
+	case "mbox":
+		m.outFunc = outputMbox
+	default:
+		return usage("unknown output type: " + m.output)
+	}
+	// Setup REST client
+	c, err := client.New(baseURL())
+	if err != nil {
+		return fatal("Couldn't build client", err)
+	}
+	// Get list
+	headers, err := c.ListMailbox(mailbox)
+	if err != nil {
+		return fatal("List REST call failed", err)
+	}
+	// Find matches
+	matches := make([]*client.MessageHeader, 0, len(headers))
+	for _, h := range headers {
+		if m.match(h) {
+			matches = append(matches, h)
+		}
+	}
+	// Return error status if no matches
+	if len(matches) == 0 {
+		return subcommands.ExitFailure
+	}
+	// Output matches
+	err = m.outFunc(matches)
+	if err != nil {
+		return fatal("Error", err)
+	}
+	if m.delete {
+		// Delete matches
+		for _, h := range matches {
+			err = h.Delete()
+			if err != nil {
+				return fatal("Delete REST call failed", err)
+			}
+		}
+	}
+	return subcommands.ExitSuccess
+}
+
+// match returns true if header matches all defined criteria
+func (m *matchCmd) match(header *client.MessageHeader) bool {
+	if m.maxAge > 0 {
+		if time.Since(header.Date) > m.maxAge {
+			return false
+		}
+	}
+	if m.subject.Defined() {
+		if !m.subject.MatchString(header.Subject) {
+			return false
+		}
+	}
+	if m.from.Defined() {
+		from := header.From
+		addr, err := mail.ParseAddress(from)
+		if err == nil {
+			// Parsed successfully
+			from = addr.Address
+		}
+		if !m.from.MatchString(from) {
+			return false
+		}
+	}
+	if m.to.Defined() {
+		match := false
+		for _, to := range header.To {
+			addr, err := mail.ParseAddress(to)
+			if err == nil {
+				// Parsed successfully
+				to = addr.Address
+			}
+			if m.to.MatchString(to) {
+				match = true
+				break
+			}
+		}
+		if !match {
+			return false
+		}
+	}
+	return true
+}
+
+func outputID(headers []*client.MessageHeader) error {
+	for _, h := range headers {
+		fmt.Println(h.ID)
+	}
+	return nil
+}
+
+func outputJSON(headers []*client.MessageHeader) error {
+	jsonEncoder := json.NewEncoder(os.Stdout)
+	jsonEncoder.SetEscapeHTML(false)
+	jsonEncoder.SetIndent("", "  ")
+	return jsonEncoder.Encode(headers)
+}

cmd/client/mbox.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/google/subcommands"
+	"github.com/jhillyerd/inbucket/pkg/rest/client"
+)
+
+type mboxCmd struct {
+	mailbox string
+	delete  bool
+}
+
+func (*mboxCmd) Name() string {
+	return "mbox"
+}
+
+func (*mboxCmd) Synopsis() string {
+	return "output mailbox in mbox format"
+}
+
+func (*mboxCmd) Usage() string {
+	return `mbox [flags] <mailbox>:
+	output mailbox in mbox format
+`
+}
+
+func (m *mboxCmd) SetFlags(f *flag.FlagSet) {
+	f.BoolVar(&m.delete, "delete", false, "delete messages after output")
+}
+
+func (m *mboxCmd) Execute(
+	_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
+	mailbox := f.Arg(0)
+	if mailbox == "" {
+		return usage("mailbox required")
+	}
+	// Setup REST client
+	c, err := client.New(baseURL())
+	if err != nil {
+		return fatal("Couldn't build client", err)
+	}
+	// Get list
+	headers, err := c.ListMailbox(mailbox)
+	if err != nil {
+		return fatal("List REST call failed", err)
+	}
+	err = outputMbox(headers)
+	if err != nil {
+		return fatal("Error", err)
+	}
+	if m.delete {
+		// Delete matches
+		for _, h := range headers {
+			err = h.Delete()
+			if err != nil {
+				return fatal("Delete REST call failed", err)
+			}
+		}
+	}
+	return subcommands.ExitSuccess
+}
+
+// outputMbox renders messages in mbox format
+// also used by match subcommand
+func outputMbox(headers []*client.MessageHeader) error {
+	for _, h := range headers {
+		source, err := h.GetSource()
+		if err != nil {
+			return fmt.Errorf("Get source REST failed: %v", err)
+		}
+		fmt.Printf("From %s\n", h.From)
+		// TODO Escape "From " in message bodies with >
+		source.WriteTo(os.Stdout)
+		fmt.Println()
+	}
+	return nil
+}

cmd/inbucket/main.go

@@ -0,0 +1,231 @@
+// main is the inbucket daemon launcher
+package main
+
+import (
+	"bufio"
+	"context"
+	"expvar"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"os/signal"
+	"runtime"
+	"syscall"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/msghub"
+	"github.com/jhillyerd/inbucket/pkg/policy"
+	"github.com/jhillyerd/inbucket/pkg/rest"
+	"github.com/jhillyerd/inbucket/pkg/server/pop3"
+	"github.com/jhillyerd/inbucket/pkg/server/smtp"
+	"github.com/jhillyerd/inbucket/pkg/server/web"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/storage/file"
+	"github.com/jhillyerd/inbucket/pkg/storage/mem"
+	"github.com/jhillyerd/inbucket/pkg/webui"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+var (
+	// version contains the build version number, populated during linking.
+	version = "undefined"
+
+	// date contains the build date, populated during linking.
+	date = "undefined"
+)
+
+func init() {
+	// Server uptime for status page.
+	startTime := time.Now()
+	expvar.Publish("uptime", expvar.Func(func() interface{} {
+		return time.Since(startTime) / time.Second
+	}))
+
+	// Goroutine count for status page.
+	expvar.Publish("goroutines", expvar.Func(func() interface{} {
+		return runtime.NumGoroutine()
+	}))
+
+	// Register storage implementations.
+	storage.Constructors["file"] = file.New
+	storage.Constructors["memory"] = mem.New
+}
+
+func main() {
+	// Command line flags.
+	help := flag.Bool("help", false, "Displays help on flags and env variables.")
+	pidfile := flag.String("pidfile", "", "Write our PID into the specified file.")
+	logfile := flag.String("logfile", "stderr", "Write out log into the specified file.")
+	logjson := flag.Bool("logjson", false, "Logs are written in JSON format.")
+	netdebug := flag.Bool("netdebug", false, "Dump SMTP & POP3 network traffic to stdout.")
+	flag.Usage = func() {
+		fmt.Fprintln(os.Stderr, "Usage: inbucket [options]")
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+	if *help {
+		flag.Usage()
+		fmt.Fprintln(os.Stderr, "")
+		config.Usage()
+		return
+	}
+	// Process configuration.
+	config.Version = version
+	config.BuildDate = date
+	conf, err := config.Process()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Configuration error: %v\n", err)
+		os.Exit(1)
+	}
+	if *netdebug {
+		conf.POP3.Debug = true
+		conf.SMTP.Debug = true
+	}
+	// Logger setup.
+	closeLog, err := openLog(conf.LogLevel, *logfile, *logjson)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Log error: %v\n", err)
+		os.Exit(1)
+	}
+	startupLog := log.With().Str("phase", "startup").Logger()
+	// Setup signal handler.
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGINT)
+	// Initialize logging.
+	startupLog.Info().Str("version", config.Version).Str("buildDate", config.BuildDate).
+		Msg("Inbucket starting")
+	// Write pidfile if requested.
+	if *pidfile != "" {
+		pidf, err := os.Create(*pidfile)
+		if err != nil {
+			startupLog.Fatal().Err(err).Str("path", *pidfile).Msg("Failed to create pidfile")
+		}
+		fmt.Fprintf(pidf, "%v\n", os.Getpid())
+		if err := pidf.Close(); err != nil {
+			startupLog.Fatal().Err(err).Str("path", *pidfile).Msg("Failed to close pidfile")
+		}
+	}
+	// Configure internal services.
+	rootCtx, rootCancel := context.WithCancel(context.Background())
+	shutdownChan := make(chan bool)
+	store, err := storage.FromConfig(conf.Storage)
+	if err != nil {
+		removePIDFile(*pidfile)
+		startupLog.Fatal().Err(err).Str("module", "storage").Msg("Fatal storage error")
+	}
+	msgHub := msghub.New(rootCtx, conf.Web.MonitorHistory)
+	addrPolicy := &policy.Addressing{Config: conf}
+	mmanager := &message.StoreManager{AddrPolicy: addrPolicy, Store: store, Hub: msgHub}
+	// Start Retention scanner.
+	retentionScanner := storage.NewRetentionScanner(conf.Storage, store, shutdownChan)
+	retentionScanner.Start()
+	// Start HTTP server.
+	web.Initialize(conf, shutdownChan, mmanager, msgHub)
+	rest.SetupRoutes(web.Router)
+	webui.SetupRoutes(web.Router)
+	go web.Start(rootCtx)
+	// Start POP3 server.
+	pop3Server := pop3.New(conf.POP3, shutdownChan, store)
+	go pop3Server.Start(rootCtx)
+	// Start SMTP server.
+	smtpServer := smtp.NewServer(conf.SMTP, shutdownChan, mmanager, addrPolicy)
+	go smtpServer.Start(rootCtx)
+	// Loop forever waiting for signals or shutdown channel.
+signalLoop:
+	for {
+		select {
+		case sig := <-sigChan:
+			switch sig {
+			case syscall.SIGINT:
+				// Shutdown requested
+				log.Info().Str("phase", "shutdown").Str("signal", "SIGINT").
+					Msg("Received SIGINT, shutting down")
+				close(shutdownChan)
+			case syscall.SIGTERM:
+				// Shutdown requested
+				log.Info().Str("phase", "shutdown").Str("signal", "SIGTERM").
+					Msg("Received SIGTERM, shutting down")
+				close(shutdownChan)
+			}
+		case <-shutdownChan:
+			rootCancel()
+			break signalLoop
+		}
+	}
+	// Wait for active connections to finish.
+	go timedExit(*pidfile)
+	smtpServer.Drain()
+	pop3Server.Drain()
+	retentionScanner.Join()
+	removePIDFile(*pidfile)
+	closeLog()
+}
+
+// openLog configures zerolog output, returns func to close logfile.
+func openLog(level string, logfile string, json bool) (close func(), err error) {
+	switch level {
+	case "debug":
+		zerolog.SetGlobalLevel(zerolog.DebugLevel)
+	case "info":
+		zerolog.SetGlobalLevel(zerolog.InfoLevel)
+	case "warn":
+		zerolog.SetGlobalLevel(zerolog.WarnLevel)
+	case "error":
+		zerolog.SetGlobalLevel(zerolog.ErrorLevel)
+	default:
+		return nil, fmt.Errorf("Log level %q not one of: debug, info, warn, error", level)
+	}
+	close = func() {}
+	var w io.Writer
+	color := true
+	switch logfile {
+	case "stderr":
+		w = os.Stderr
+	case "stdout":
+		w = os.Stdout
+	default:
+		logf, err := os.OpenFile(logfile, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
+		if err != nil {
+			return nil, err
+		}
+		bw := bufio.NewWriter(logf)
+		w = bw
+		color = false
+		close = func() {
+			_ = bw.Flush()
+			_ = logf.Close()
+		}
+	}
+	w = zerolog.SyncWriter(w)
+	if json {
+		log.Logger = log.Output(w)
+		return close, nil
+	}
+	log.Logger = log.Output(zerolog.ConsoleWriter{
+		Out:     w,
+		NoColor: !color,
+	})
+	return close, nil
+}
+
+// removePIDFile removes the PID file if created.
+func removePIDFile(pidfile string) {
+	if pidfile != "" {
+		if err := os.Remove(pidfile); err != nil {
+			log.Error().Str("phase", "shutdown").Err(err).Str("path", pidfile).
+				Msg("Failed to remove pidfile")
+		}
+	}
+}
+
+// timedExit is called as a goroutine during shutdown, it will force an exit after 15 seconds.
+func timedExit(pidfile string) {
+	time.Sleep(15 * time.Second)
+	removePIDFile(pidfile)
+	log.Error().Str("phase", "shutdown").Msg("Clean shutdown took too long, forcing exit")
+	os.Exit(0)
+}

config/config.go

@@ -1,270 +0,0 @@
-package config
-
-import (
-	"fmt"
-	"net"
-	"os"
-	"sort"
-	"strings"
-
-	"github.com/robfig/config"
-)
-
-// SMTPConfig contains the SMTP server configuration - not using pointers so that we can pass around
-// copies of the object safely.
-type SMTPConfig struct {
-	IP4address      net.IP
-	IP4port         int
-	Domain          string
-	DomainNoStore   string
-	MaxRecipients   int
-	MaxIdleSeconds  int
-	MaxMessageBytes int
-	StoreMessages   bool
-}
-
-// POP3Config contains the POP3 server configuration
-type POP3Config struct {
-	IP4address     net.IP
-	IP4port        int
-	Domain         string
-	MaxIdleSeconds int
-}
-
-// WebConfig contains the HTTP server configuration
-type WebConfig struct {
-	IP4address     net.IP
-	IP4port        int
-	TemplateDir    string
-	TemplateCache  bool
-	PublicDir      string
-	GreetingFile   string
-	MailboxPrompt  string
-	CookieAuthKey  string
-	MonitorVisible bool
-	MonitorHistory int
-}
-
-// DataStoreConfig contains the mail store configuration
-type DataStoreConfig struct {
-	Path             string
-	RetentionMinutes int
-	RetentionSleep   int
-	MailboxMsgCap    int
-}
-
-const (
-	missingErrorFmt = "[%v] missing required option %q"
-	parseErrorFmt   = "[%v] option %q error: %v"
-)
-
-var (
-	// Version of this build, set by main
-	Version = ""
-
-	// BuildDate for this build, set by main
-	BuildDate = ""
-
-	// Config is our global robfig/config object
-	Config   *config.Config
-	logLevel string
-
-	// Parsed specific configs
-	smtpConfig      = &SMTPConfig{}
-	pop3Config      = &POP3Config{}
-	webConfig       = &WebConfig{}
-	dataStoreConfig = &DataStoreConfig{}
-)
-
-// GetSMTPConfig returns a copy of the SmtpConfig object
-func GetSMTPConfig() SMTPConfig {
-	return *smtpConfig
-}
-
-// GetPOP3Config returns a copy of the Pop3Config object
-func GetPOP3Config() POP3Config {
-	return *pop3Config
-}
-
-// GetWebConfig returns a copy of the WebConfig object
-func GetWebConfig() WebConfig {
-	return *webConfig
-}
-
-// GetDataStoreConfig returns a copy of the DataStoreConfig object
-func GetDataStoreConfig() DataStoreConfig {
-	return *dataStoreConfig
-}
-
-// GetLogLevel returns the configured log level
-func GetLogLevel() string {
-	return logLevel
-}
-
-// LoadConfig loads the specified configuration file into inbucket.Config and performs validations
-// on it.
-func LoadConfig(filename string) error {
-	var err error
-	Config, err = config.ReadDefault(filename)
-	if err != nil {
-		return err
-	}
-	// Validation error messages
-	messages := make([]string, 0)
-	// Validate sections
-	for _, s := range []string{"logging", "smtp", "pop3", "web", "datastore"} {
-		if !Config.HasSection(s) {
-			messages = append(messages,
-				fmt.Sprintf("Config section [%v] is required", s))
-		}
-	}
-	// Return immediately if config is missing entire sections
-	if len(messages) > 0 {
-		fmt.Fprintln(os.Stderr, "Error(s) validating configuration:")
-		for _, m := range messages {
-			fmt.Fprintln(os.Stderr, " -", m)
-		}
-		return fmt.Errorf("Failed to validate configuration")
-	}
-	// Load string config options
-	stringOptions := []struct {
-		section  string
-		name     string
-		target   *string
-		required bool
-	}{
-		{"logging", "level", &logLevel, true},
-		{"smtp", "domain", &smtpConfig.Domain, true},
-		{"smtp", "domain.nostore", &smtpConfig.DomainNoStore, false},
-		{"pop3", "domain", &pop3Config.Domain, true},
-		{"web", "template.dir", &webConfig.TemplateDir, true},
-		{"web", "public.dir", &webConfig.PublicDir, true},
-		{"web", "greeting.file", &webConfig.GreetingFile, true},
-		{"web", "mailbox.prompt", &webConfig.MailboxPrompt, false},
-		{"web", "cookie.auth.key", &webConfig.CookieAuthKey, false},
-		{"datastore", "path", &dataStoreConfig.Path, true},
-	}
-	for _, opt := range stringOptions {
-		str, err := Config.String(opt.section, opt.name)
-		if Config.HasOption(opt.section, opt.name) && err != nil {
-			messages = append(messages, fmt.Sprintf(parseErrorFmt, opt.section, opt.name, err))
-			continue
-		}
-		if str == "" && opt.required {
-			messages = append(messages, fmt.Sprintf(missingErrorFmt, opt.section, opt.name))
-		}
-		*opt.target = str
-	}
-	// Load boolean config options
-	boolOptions := []struct {
-		section  string
-		name     string
-		target   *bool
-		required bool
-	}{
-		{"smtp", "store.messages", &smtpConfig.StoreMessages, true},
-		{"web", "template.cache", &webConfig.TemplateCache, true},
-		{"web", "monitor.visible", &webConfig.MonitorVisible, true},
-	}
-	for _, opt := range boolOptions {
-		if Config.HasOption(opt.section, opt.name) {
-			flag, err := Config.Bool(opt.section, opt.name)
-			if err != nil {
-				messages = append(messages, fmt.Sprintf(parseErrorFmt, opt.section, opt.name, err))
-			}
-			*opt.target = flag
-		} else {
-			if opt.required {
-				messages = append(messages, fmt.Sprintf(missingErrorFmt, opt.section, opt.name))
-			}
-		}
-	}
-	// Load integer config options
-	intOptions := []struct {
-		section  string
-		name     string
-		target   *int
-		required bool
-	}{
-		{"smtp", "ip4.port", &smtpConfig.IP4port, true},
-		{"smtp", "max.recipients", &smtpConfig.MaxRecipients, true},
-		{"smtp", "max.idle.seconds", &smtpConfig.MaxIdleSeconds, true},
-		{"smtp", "max.message.bytes", &smtpConfig.MaxMessageBytes, true},
-		{"pop3", "ip4.port", &pop3Config.IP4port, true},
-		{"pop3", "max.idle.seconds", &pop3Config.MaxIdleSeconds, true},
-		{"web", "ip4.port", &webConfig.IP4port, true},
-		{"web", "monitor.history", &webConfig.MonitorHistory, true},
-		{"datastore", "retention.minutes", &dataStoreConfig.RetentionMinutes, true},
-		{"datastore", "retention.sleep.millis", &dataStoreConfig.RetentionSleep, true},
-		{"datastore", "mailbox.message.cap", &dataStoreConfig.MailboxMsgCap, true},
-	}
-	for _, opt := range intOptions {
-		if Config.HasOption(opt.section, opt.name) {
-			num, err := Config.Int(opt.section, opt.name)
-			if err != nil {
-				messages = append(messages, fmt.Sprintf(parseErrorFmt, opt.section, opt.name, err))
-			}
-			*opt.target = num
-		} else {
-			if opt.required {
-				messages = append(messages, fmt.Sprintf(missingErrorFmt, opt.section, opt.name))
-			}
-		}
-	}
-	// Load IP address config options
-	ipOptions := []struct {
-		section  string
-		name     string
-		target   *net.IP
-		required bool
-	}{
-		{"smtp", "ip4.address", &smtpConfig.IP4address, true},
-		{"pop3", "ip4.address", &pop3Config.IP4address, true},
-		{"web", "ip4.address", &webConfig.IP4address, true},
-	}
-	for _, opt := range ipOptions {
-		if Config.HasOption(opt.section, opt.name) {
-			str, err := Config.String(opt.section, opt.name)
-			if err != nil {
-				messages = append(messages, fmt.Sprintf(parseErrorFmt, opt.section, opt.name, err))
-				continue
-			}
-			addr := net.ParseIP(str)
-			if addr == nil {
-				messages = append(messages,
-					fmt.Sprintf("Failed to parse IP [%v]%v: %q", opt.section, opt.name, str))
-				continue
-			}
-			addr = addr.To4()
-			if addr == nil {
-				messages = append(messages,
-					fmt.Sprintf("Failed to parse IP [%v]%v: %q not IPv4!",
-						opt.section, opt.name, str))
-			}
-			*opt.target = addr
-		} else {
-			if opt.required {
-				messages = append(messages, fmt.Sprintf(missingErrorFmt, opt.section, opt.name))
-			}
-		}
-	}
-	// Validate log level
-	switch strings.ToUpper(logLevel) {
-	case "":
-		// Missing was already reported
-	case "TRACE", "INFO", "WARN", "ERROR":
-	default:
-		messages = append(messages,
-			fmt.Sprintf("Invalid value provided for [logging]level: %q", logLevel))
-	}
-	// Print messages and return error if any validations failed
-	if len(messages) > 0 {
-		fmt.Fprintln(os.Stderr, "Error(s) validating configuration:")
-		sort.Strings(messages)
-		for _, m := range messages {
-			fmt.Fprintln(os.Stderr, " -", m)
-		}
-		return fmt.Errorf("Failed to validate configuration")
-	}
-	return nil
-}

doc/config.md

@@ -0,0 +1,424 @@
+# Inbucket Configuration
+
+Inbucket is configured via environment variables.  Most options have a
+reasonable default, but it is likely you will need to change some to suite your
+desired use cases.
+
+Running `inbucket -help` will yield a condensed summary of the environment
+variables it supports:
+
+    KEY                                 DEFAULT             DESCRIPTION
+    INBUCKET_LOGLEVEL                   info                debug, info, warn, or error
+    INBUCKET_MAILBOXNAMING              local               Use local or full addressing
+    INBUCKET_SMTP_ADDR                  0.0.0.0:2500        SMTP server IP4 host:port
+    INBUCKET_SMTP_DOMAIN                inbucket            HELO domain
+    INBUCKET_SMTP_MAXRECIPIENTS         200                 Maximum RCPT TO per message
+    INBUCKET_SMTP_MAXMESSAGEBYTES       10240000            Maximum message size
+    INBUCKET_SMTP_DEFAULTACCEPT         true                Accept all mail by default?
+    INBUCKET_SMTP_ACCEPTDOMAINS                             Domains to accept mail for
+    INBUCKET_SMTP_REJECTDOMAINS                             Domains to reject mail for
+    INBUCKET_SMTP_DEFAULTSTORE          true                Store all mail by default?
+    INBUCKET_SMTP_STOREDOMAINS                              Domains to store mail for
+    INBUCKET_SMTP_DISCARDDOMAINS                            Domains to discard mail for
+    INBUCKET_SMTP_TIMEOUT               300s                Idle network timeout
+    INBUCKET_POP3_ADDR                  0.0.0.0:1100        POP3 server IP4 host:port
+    INBUCKET_POP3_DOMAIN                inbucket            HELLO domain
+    INBUCKET_POP3_TIMEOUT               600s                Idle network timeout
+    INBUCKET_WEB_ADDR                   0.0.0.0:9000        Web server IP4 host:port
+    INBUCKET_WEB_UIDIR                  ui                  User interface dir
+    INBUCKET_WEB_GREETINGFILE           ui/greeting.html    Home page greeting HTML
+    INBUCKET_WEB_TEMPLATECACHE          true                Cache templates after first use?
+    INBUCKET_WEB_MAILBOXPROMPT          @inbucket           Prompt next to mailbox input
+    INBUCKET_WEB_COOKIEAUTHKEY                              Session cipher key (text)
+    INBUCKET_WEB_MONITORVISIBLE         true                Show monitor tab in UI?
+    INBUCKET_WEB_MONITORHISTORY         30                  Monitor remembered messages
+    INBUCKET_STORAGE_TYPE               memory              Storage impl: file or memory
+    INBUCKET_STORAGE_PARAMS                                 Storage impl parameters, see docs.
+    INBUCKET_STORAGE_RETENTIONPERIOD    24h                 Duration to retain messages
+    INBUCKET_STORAGE_RETENTIONSLEEP     50ms                Duration to sleep between mailboxes
+    INBUCKET_STORAGE_MAILBOXMSGCAP      500                 Maximum messages per mailbox
+
+The following documentation will describe each of these in more detail.
+
+
+## Global
+
+### Log Level
+
+`INBUCKET_LOGLEVEL`
+
+This setting controls the verbosity of log output.  A small desktop installation
+should probably select `info`, but a busy shared installation would be better
+off with `warn` or `error`.
+
+- Default: `info`
+- Values: one of `debug`, `info`, `warn`, or `error`
+
+### Mailbox Naming
+
+`INBUCKET_MAILBOXNAMING`
+
+The mailbox naming setting determines the name of a mailbox for an incoming
+message, and thus where it must be retrieved from later.
+
+#### `local` ensures the domain is removed, such that:
+
+- `james@inbucket.org` is stored in `james`
+- `james+spam@inbucket.org` is stored in `james`
+
+#### `full` retains the domain as part of the name, such that:
+
+- `james@inbucket.org` is stored in `james@inbucket.org`
+- `james+spam@inbucket.org` is stored in `james@inbucket.org`
+
+Prior to the addition of the mailbox naming setting, Inbucket always operated in
+local mode.  Regardless of this setting, the `+` wildcard/extension is not
+incorporated into the mailbox name.
+
+- Default: `local`
+- Values: one of `local` or `full`
+
+
+## SMTP
+
+### Address and Port
+
+`INBUCKET_SMTP_ADDR`
+
+The IPv4 address and TCP port number the SMTP server should listen on, separated
+by a colon.  Some operating systems may prevent Inbucket from listening on port
+25 without escalated privileges.  Using an IP address of 0.0.0.0 will cause
+Inbucket to listen on all available network interfaces.
+
+- Default: `0.0.0.0:2500`
+
+### Greeting Domain
+
+`INBUCKET_SMTP_DOMAIN`
+
+The domain used in the SMTP greeting:
+
+    220 domain Inbucket SMTP ready
+
+Most SMTP clients appear to ignore this value.
+
+- Default: `inbucket`
+
+### Maximum Recipients
+
+`INBUCKET_SMTP_MAXRECIPIENTS`
+
+Maximum number of recipients allowed (SMTP `RCPT TO` phase).  If you are testing
+a mailing list server, you may need to increase this value.  For comparison, the
+Postfix SMTP server uses a default of 1000, it would be unwise to exceed this.
+
+- Default: `200`
+
+### Maximum Message Size
+
+`INBUCKET_SMTP_MAXMESSAGEBYTES`
+
+Maximum allowable size of a message (including headers) in bytes.  Messages
+exceeding this size will be rejected during the SMTP `DATA` phase.
+
+- Default: `10240000` (10MB)
+
+### Default Recipient Accept Policy
+
+`INBUCKET_SMTP_DEFAULTACCEPT`
+
+If true, Inbucket will accept mail to any domain unless present in the reject
+domains list.  If false, recipients will be rejected unless their domain is
+present in the accept domains list.
+
+- Default: `true`
+- Values: `true` or `false`
+
+### Accepted Recipient Domain List
+
+`INBUCKET_SMTP_ACCEPTDOMAINS`
+
+List of domains to accept mail for when `INBUCKET_SMTP_DEFAULTACCEPT` is false;
+has no effect when true.
+
+- Default: None
+- Values: Comma separated list of domains
+- Example: `localhost,mysite.org`
+
+### Rejected Recipient Domain List
+
+`INBUCKET_SMTP_REJECTDOMAINS`
+
+List of domains to reject mail for when `INBUCKET_SMTP_DEFAULTACCEPT` is true;
+has no effect when false.
+
+- Default: None
+- Values: Comma separated list of domains
+- Example: `reject.com,gmail.com`
+
+### Default Recipient Store Policy
+
+`INBUCKET_SMTP_DEFAULTSTORE`
+
+If true, Inbucket will store mail sent to any domain unless present in the
+discard domains list.  If false, messages will be discarded unless their domain
+is present in the store domains list.
+
+- Default: `true`
+- Values: `true` or `false`
+
+### Stored Recipient Domain List
+
+`INBUCKET_SMTP_STOREDOMAINS`
+
+List of domains to store mail for when `INBUCKET_SMTP_DEFAULTSTORE` is false;
+has no effect when true.
+
+- Default: None
+- Values: Comma separated list of domains
+- Example: `localhost,mysite.org`
+
+### Discarded Recipient Domain List
+
+`INBUCKET_SMTP_DISCARDDOMAINS`
+
+Mail sent to these domains will not be stored by Inbucket.  This is helpful if
+you are load or soak testing a service, and do not plan to inspect the resulting
+emails.  Messages sent to a domain other than this will be stored normally.
+Only has an effect when `INBUCKET_SMTP_DEFAULTSTORE` is true.
+
+- Default: None
+- Values: Comma separated list of domains
+- Example: `recycle.com,loadtest.org`
+
+### Network Idle Timeout
+
+`INBUCKET_SMTP_TIMEOUT`
+
+Delay before closing an idle SMTP connection.  The SMTP RFC recommends 300
+seconds.  Consider reducing this *significantly* if you plan to expose Inbucket
+to the public internet.
+
+- Default: `300s`
+- Values: Duration ending in `s` for seconds, `m` for minutes
+
+
+## POP3
+
+### Address and Port
+
+`INBUCKET_POP3_ADDR`
+
+The IPv4 address and TCP port number the POP3 server should listen on, separated
+by a colon.  Some operating systems may prevent Inbucket from listening on port
+110 without escalated privileges.  Using an IP address of 0.0.0.0 will cause
+Inbucket to listen on all available network interfaces.
+
+- Default: `0.0.0.0:1100`
+
+### Greeting Domain
+
+`INBUCKET_POP3_DOMAIN`
+
+The domain used in the POP3 greeting:
+
+    +OK Inbucket POP3 server ready <26641.1522000423@domain>
+
+Most POP3 clients appear to ignore this value.
+
+- Default: `inbucket`
+
+### Network Idle Timeout
+
+`INBUCKET_POP3_TIMEOUT`
+
+Delay before closing an idle POP3 connection.  The POP3 RFC recommends 600
+seconds.  Consider reducing this *significantly* if you plan to expose Inbucket
+to the public internet.
+
+- Default: `600s`
+- Values: Duration ending in `s` for seconds, `m` for minutes
+
+
+## Web
+
+### Address and Port
+
+`INBUCKET_WEB_ADDR`
+
+The IPv4 address and TCP port number the HTTP server should listen on, separated
+by a colon.  Some operating systems may prevent Inbucket from listening on port
+80 without escalated privileges.  Using an IP address of 0.0.0.0 will cause
+Inbucket to listen on all available network interfaces.
+
+- Default: `0.0.0.0:9000`
+
+### UI Directory
+
+`INBUCKET_WEB_UIDIR`
+
+This directory contains the templates and static assets for the web user
+interface.  You will need to change this if the current working directory
+doesn't contain the `ui` directory at startup.
+
+Inbucket will load templates from the `templates` sub-directory, and serve
+static assets from the `static` sub-directory.
+
+- Default: `ui`
+- Values: Operating system specific path syntax
+
+### Greeting HTML File
+
+`INBUCKET_WEB_GREETINGFILE`
+
+The content of the greeting file will be injected into the front page of
+Inbucket.  It can be used to instruct users on how to send mail into your
+Inbucket installation, as well as link to REST documentation, etc.
+
+- Default: `ui/greeting.html`
+
+### Template Caching
+
+`INBUCKET_WEB_TEMPLATECACHE`
+
+Tells Inbucket to cache parsed template files.  This should be left as default
+unless you are a developer working on the Inbucket web interface.
+
+- Default: `true`
+- Values: `true` or `false`
+
+### Mailbox Prompt
+
+`INBUCKET_WEB_MAILBOXPROMPT`
+
+Text prompt displayed to the right of the mailbox name input field in the web
+interface.  Can be used to nudge your users into typing just the mailbox name
+instead of an entire email address.
+
+Set to an empty string to hide the prompt.
+
+- Default: `@inbucket`
+
+### Cookie Authentication Key
+
+`INBUCKET_WEB_COOKIEAUTHKEY`
+
+Inbucket stores session information in an encrypted browser cookie.  Unless
+specified, Inbucket generates a random key at startup.  The only notable data
+stored in a user session is the list of recently accessed mailboxes.
+
+- Default: None
+- Value: Text string, no particular format required
+
+### Monitor Visible
+
+`INBUCKET_WEB_MONITORVISIBLE`
+
+If true, the Monitor tab will be available, allowing users to observe all
+messages received by Inbucket as they arrive.  Disabling the monitor facilitates
+security through obscurity.
+
+This setting has no impact on the availability of the underlying WebSocket,
+which may be used by other parts of the Inbucket interface or continuous
+integration tests.
+
+- Default: `true`
+- Values: `true` or `false`
+
+### Monitor History
+
+`INBUCKET_WEB_MONITORHISTORY`
+
+The number of messages to remember on the *server* for new Monitor clients.
+Does not impact the amount of *new* messages displayed by the Monitor.
+Increasing this has no appreciable impact on memory use, but may slow down the
+Monitor user interface.
+
+This setting has the same effect on the amount of messages available via
+WebSocket.
+
+Setting to 0 will disable the monitor, but will probably break new mail
+notifications in the web interface when I finally get around to implementing
+them.
+
+- Default: `30`
+- Values: Integer greater than or equal to 0
+
+
+## Storage
+
+### Type
+
+`INBUCKET_STORAGE_TYPE`
+
+Selects the storage implementation to use.  Currently Inbucket supports two:
+
+- `file`: stores messages as individual files in a nested directory structure
+  based on the hash of the mailbox name.  Each mailbox also includes an index
+  file to speed up enumeration of the mailbox contents.
+- `memory`: stores messages in RAM, they will be lost if Inbucket is restarted,
+  or crashes, etc.
+
+File storage is recommended for larger/shared installations.  Memory is better
+suited to desktop or continuous integration test use cases.
+
+- Default: `memory`
+- Values: `file` or `memory`
+
+### Parameters
+
+`INBUCKET_STORAGE_PARAMS`
+
+Parameters specific to the storage type selected.  Formatted as a comma
+separated list of key:value pairs.
+
+- Default: None
+- Examples: `maxkb=10240` or `path=/tmp/inbucket`
+
+#### `file` type parameters
+
+- `path`: Operating system specific path to the directory where mail should be
+  stored.
+
+#### `memory` type parameters
+
+- `maxkb`: Maximum size of the mail store in kilobytes.  The oldest messages in
+  the store will be deleted to enforce the limit.  In-memory storage has some
+  overhead, for now it is recommended to set this to half the total amount of
+  memory you are willing to allocate to Inbucket.
+
+### Retention Period
+
+`INBUCKET_STORAGE_RETENTIONPERIOD`
+
+If set, Inbucket will scan the contents of its mail store once per minute,
+removing messages older than this.  This will be enforced regardless of the type
+of storage configured.
+
+- Default: `24h`
+- Values: Duration ending in `m` for minutes, `h` for hours.  Should be
+  significantly longer than one minute, or `0` to disable.
+
+### Retention Sleep
+
+`INBUCKET_STORAGE_RETENTIONSLEEP`
+
+Duration to sleep between scanning each mailbox for expired messages.
+Increasing this number will reduce disk thrashing, but extend the length of time
+required to complete a scan of the entire mail store.
+
+This delay is still enforced for memory stores, but could be reduced from the
+default.  Setting to `0` may degrade performance of HTTP/SMTP/POP3 services.
+
+- Default: `50ms`
+- Values: Duration ending in `ms` for milliseconds, `s` for seconds
+
+### Per Mailbox Message Cap
+
+`INBUCKET_STORAGE_MAILBOXMSGCAP`
+
+Maximum messages allowed in a single mailbox, exceeding this will cause older
+messages to be deleted from the mailbox.
+
+- Default: `500`
+- Values: Positive integer, or `0` to disable

etc/dev-start.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+# dev-start.sh
+# description: Developer friendly Inbucket configuration
+
+export INBUCKET_LOGLEVEL="debug"
+export INBUCKET_SMTP_DISCARDDOMAINS="bitbucket.local"
+export INBUCKET_WEB_TEMPLATECACHE="false"
+export INBUCKET_WEB_COOKIEAUTHKEY="not-secret"
+export INBUCKET_STORAGE_TYPE="file"
+export INBUCKET_STORAGE_PARAMS="path:/tmp/inbucket"
+export INBUCKET_STORAGE_RETENTIONPERIOD="15m"
+
+if ! test -x ./inbucket; then
+  echo "$PWD/inbucket not found/executable!" >&2
+  echo "Run this script from the inbucket root directory after running make" >&2
+  exit 1
+fi
+
+exec ./inbucket $*

etc/devel.conf

@@ -1,129 +0,0 @@
-# devel.conf
-# Sample development configuration
-
-#############################################################################
-[DEFAULT]
-
-# Not used directly, but is typically referenced below in %()s format.
-install.dir=.
-default.domain=inbucket.local
-
-#############################################################################
-[logging]
-
-# Options from least to most verbose: ERROR, WARN, INFO, TRACE
-level=TRACE
-
-#############################################################################
-[smtp]
-
-# IPv4 address to listen for SMTP connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for SMTP connections on.
-ip4.port=2500
-
-# used in SMTP greeting
-domain=%(default.domain)s
-
-# optional: mail sent to accounts at this domain will not be stored,
-# for mixed use (content and load testing)
-domain.nostore=bitbucket.local
-
-# Maximum number of RCPT TO: addresses we allow from clients, the SMTP
-# RFC recommends this be at least 100.
-max.recipients=100
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, SMTP RFC recommends at least 5 minutes (300 seconds).
-max.idle.seconds=30
-
-# Maximum allowable size of message body in bytes (including attachments)
-max.message.bytes=20480000
-
-# Should we place messages into the datastore, or just throw them away
-# (for load testing): true or false
-store.messages=true
-
-#############################################################################
-[pop3]
-
-# IPv4 address to listen for POP3 connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for POP3 connections on.
-ip4.port=1100
-
-# used in POP3 greeting
-domain=%(default.domain)s
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, POP3 RFC requires at least 10 minutes (600 seconds).
-max.idle.seconds=600
-
-#############################################################################
-[web]
-
-# IPv4 address to serve HTTP web interface on
-ip4.address=0.0.0.0
-
-# IPv4 port to serve HTTP web interface on
-ip4.port=9000
-
-# Name of web theme to use
-theme=bootstrap
-
-# Prompt displayed between the mailbox entry field and View button. Leave
-# empty or comment out to hide the prompt.
-mailbox.prompt=@inbucket
-
-# Path to the selected themes template files
-template.dir=%(install.dir)s/themes/%(theme)s/templates
-
-# Should we cache parsed templates (set to false during theme dev)
-template.cache=false
-
-# Path to the selected themes public (static) files
-public.dir=%(install.dir)s/themes/%(theme)s/public
-
-# Path to the greeting HTML displayed on front page, can be moved out of
-# installation dir for customization
-greeting.file=%(install.dir)s/themes/greeting.html
-
-# Key used to sign session cookie data so that it cannot be tampered with.
-# If this is left unset, Inbucket will generate a random key at startup
-# and previous sessions will be invalidated.
-cookie.auth.key=secret-inbucket-session-cookie-key
-
-# Enable or disable the live message monitor tab for the web UI. This will let
-# anybody see all messages delivered to Inbucket.  This setting has no impact
-# on the availability of the underlying WebSocket.
-monitor.visible=true
-
-# How many historical message headers should be cached for display by new
-# monitor connections.  It does not limit the number of messages displayed by
-# the browser once the monitor is open; all freshly received messages will be
-# appended to the on screen list.  This setting also affects the underlying
-# API/WebSocket.
-monitor.history=30
-
-#############################################################################
-[datastore]
-
-# Path to the datastore, mail will be written into subdirectories
-path=/tmp/inbucket
-
-# How many minutes after receipt should a message be stored until it's
-# automatically purged.  To retain messages until manually deleted, set this
-# to 0
-retention.minutes=0
-
-# How many milliseconds to sleep after purging messages from a mailbox.
-# This should help reduce disk I/O when there are a large number of messages
-# to purge.
-retention.sleep.millis=100
-
-# Maximum number of messages we will store in a single mailbox. If this
-# number is exceeded, the oldest message in the box will be deleted each
-# time a new message is received for it.
-mailbox.message.cap=100

etc/docker/defaults/inbucket.conf

@@ -1,131 +0,0 @@
-# inbucket.conf
-# Configuration for Inbucket inside of Docker
-#
-# These should be reasonable defaults for a production install of Inbucket
-
-#############################################################################
-[DEFAULT]
-
-# Not used directly, but is typically referenced below in %()s format.
-install.dir=/opt/inbucket
-default.domain=inbucket.local
-
-#############################################################################
-[logging]
-
-# Options from least to most verbose: ERROR, WARN, INFO, TRACE
-level=INFO
-
-#############################################################################
-[smtp]
-
-# IPv4 address to listen for SMTP connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for SMTP connections on.
-ip4.port=10025
-
-# used in SMTP greeting
-domain=%(default.domain)s
-
-# optional: mail sent to accounts at this domain will not be stored,
-# for mixed use (content and load testing)
-domain.nostore=bitbucket.local
-
-# Maximum number of RCPT TO: addresses we allow from clients, the SMTP
-# RFC recommends this be at least 100.
-max.recipients=100
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, SMTP RFC recommends at least 5 minutes (300 seconds).
-max.idle.seconds=300
-
-# Maximum allowable size of message body in bytes (including attachments)
-max.message.bytes=2048000
-
-# Should we place messages into the datastore, or just throw them away
-# (for load testing): true or false
-store.messages=true
-
-#############################################################################
-[pop3]
-
-# IPv4 address to listen for POP3 connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for POP3 connections on.
-ip4.port=10110
-
-# used in POP3 greeting
-domain=%(default.domain)s
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, POP3 RFC requires at least 10 minutes (600 seconds).
-max.idle.seconds=600
-
-#############################################################################
-[web]
-
-# IPv4 address to serve HTTP web interface on
-ip4.address=0.0.0.0
-
-# IPv4 port to serve HTTP web interface on
-ip4.port=10080
-
-# Name of web theme to use
-theme=bootstrap
-
-# Prompt displayed between the mailbox entry field and View button. Leave
-# empty or comment out to hide the prompt.
-mailbox.prompt=@inbucket
-
-# Path to the selected themes template files
-template.dir=%(install.dir)s/themes/%(theme)s/templates
-
-# Should we cache parsed templates (set to false during theme dev)
-template.cache=true
-
-# Path to the selected themes public (static) files
-public.dir=%(install.dir)s/themes/%(theme)s/public
-
-# Path to the greeting HTML displayed on front page, can be moved out of
-# installation dir for customization
-greeting.file=/con/configuration/greeting.html
-
-# Key used to sign session cookie data so that it cannot be tampered with.
-# If this is left unset, Inbucket will generate a random key at startup
-# and previous sessions will be invalidated.
-#cookie.auth.key=secret-inbucket-session-cookie-key
-
-# Enable or disable the live message monitor tab for the web UI. This will let
-# anybody see all messages delivered to Inbucket.  This setting has no impact
-# on the availability of the underlying WebSocket.
-monitor.visible=true
-
-# How many historical message headers should be cached for display by new
-# monitor connections.  It does not limit the number of messages displayed by
-# the browser once the monitor is open; all freshly received messages will be
-# appended to the on screen list.  This setting also affects the underlying
-# API/WebSocket.
-monitor.history=30
-
-#############################################################################
-[datastore]
-
-# Path to the datastore, mail will be written into subdirectories
-path=/con/data
-
-# How many minutes after receipt should a message be stored until it's
-# automatically purged.  To retain messages until manually deleted, set this
-# to 0
-retention.minutes=4320
-
-# How many milliseconds to sleep after purging messages from a mailbox.
-# This should help reduce disk I/O when there are a large number of messages
-# to purge.
-retention.sleep.millis=100
-
-# Maximum number of messages we will store in a single mailbox. If this
-# number is exceeded, the oldest message in the box will be deleted each
-# time a new message is received for it.
-mailbox.message.cap=300

etc/docker/defaults/start-inbucket.sh

@@ -2,8 +2,9 @@
 # start-inbucket.sh
 # description: start inbucket (runs within a docker container)
 
+INBUCKET_HOME="/opt/inbucket"
 CONF_SOURCE="$INBUCKET_HOME/defaults"
-CONF_TARGET="/con/configuration"
+CONF_TARGET="/config"
 
 set -eo pipefail
 
@@ -18,7 +19,6 @@ install_default_config() {
   fi
 }
 
-install_default_config "inbucket.conf"
 install_default_config "greeting.html"
 
 exec "$INBUCKET_HOME/bin/inbucket" $* 

etc/docker/install.sh

@@ -1,48 +0,0 @@
-#!/bin/sh
-# install.sh
-# description: Build, test, and install Inbucket. Should be executed inside a Docker container.
-
-set -eo pipefail
-
-installdir="$INBUCKET_HOME"
-srcdir="$INBUCKET_SRC"
-bindir="$installdir/bin"
-defaultsdir="$installdir/defaults"
-contextdir="/con/context"
-
-echo "### Installing OS Build Dependencies"
-apk add --no-cache --virtual .build-deps git
-
-# Setup
-export GOBIN="$bindir"
-builddate="$(date -Iseconds)"
-cd "$srcdir"
-go clean
-
-# Build
-echo "### Fetching Dependencies"
-go get -t -v ./...
-
-echo "### Testing Inbucket"
-go test ./...
-
-echo "### Building Inbucket"
-go build -o inbucket -ldflags "-X 'main.BUILDDATE=$builddate'" -v .
-
-echo "### Installing Inbucket"
-set -x
-mkdir -p "$bindir"
-install inbucket "$bindir"
-mkdir -p "$contextdir"
-install etc/docker/defaults/start-inbucket.sh "$contextdir"
-cp -r themes "$installdir/"
-mkdir -p "$defaultsdir"
-cp etc/docker/defaults/inbucket.conf "$defaultsdir"
-cp etc/docker/defaults/greeting.html "$defaultsdir"
-set +x
-
-echo "### Removing OS Build Dependencies"
-apk del .build-deps
-
-echo "### Removing $GOPATH"
-rm -rf "$GOPATH"

etc/homebrew/inbucket.conf

@@ -1,131 +0,0 @@
-# inbucket.conf
-# homebrew inbucket configuration
-# {{}} values will be replaced during installation
-
-#############################################################################
-[DEFAULT]
-
-# Not used directly, but is typically referenced below in %()s format.
-default.domain=inbucket.local
-themes.dir={{HOMEBREW_PREFIX}}/share/inbucket/themes
-datastore.dir={{HOMEBREW_PREFIX}}/var/inbucket/datastore
-
-#############################################################################
-[logging]
-
-# Options from least to most verbose: ERROR, WARN, INFO, TRACE
-level=INFO
-
-#############################################################################
-[smtp]
-
-# IPv4 address to listen for SMTP connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for SMTP connections on.
-ip4.port=2500
-
-# used in SMTP greeting
-domain=%(default.domain)s
-
-# optional: mail sent to accounts at this domain will not be stored,
-# for mixed use (content and load testing)
-domain.nostore=bitbucket.local
-
-# Maximum number of RCPT TO: addresses we allow from clients, the SMTP
-# RFC recommends this be at least 100.
-max.recipients=100
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, SMTP RFC recommends at least 5 minutes (300 seconds).
-max.idle.seconds=300
-
-# Maximum allowable size of message body in bytes (including attachments)
-max.message.bytes=2048000
-
-# Should we place messages into the datastore, or just throw them away
-# (for load testing): true or false
-store.messages=true
-
-#############################################################################
-[pop3]
-
-# IPv4 address to listen for POP3 connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for POP3 connections on.
-ip4.port=1100
-
-# used in POP3 greeting
-domain=%(default.domain)s
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, POP3 RFC requires at least 10 minutes (600 seconds).
-max.idle.seconds=600
-
-#############################################################################
-[web]
-
-# IPv4 address to serve HTTP web interface on
-ip4.address=0.0.0.0
-
-# IPv4 port to serve HTTP web interface on
-ip4.port=9000
-
-# Name of web theme to use
-theme=bootstrap
-
-# Prompt displayed between the mailbox entry field and View button. Leave
-# empty or comment out to hide the prompt.
-mailbox.prompt=@inbucket
-
-# Path to the selected themes template files
-template.dir=%(themes.dir)s/%(theme)s/templates
-
-# Should we cache parsed templates (set to false during theme dev)
-template.cache=true
-
-# Path to the selected themes public (static) files
-public.dir=%(themes.dir)s/%(theme)s/public
-
-# Path to the greeting HTML displayed on front page, can be moved out of
-# installation dir for customization
-greeting.file=%(themes.dir)s/greeting.html
-
-# Key used to sign session cookie data so that it cannot be tampered with.
-# If this is left unset, Inbucket will generate a random key at startup
-# and previous sessions will be invalidated.
-cookie.auth.key=secret-inbucket-session-cookie-key
-
-# Enable or disable the live message monitor tab for the web UI. This will let
-# anybody see all messages delivered to Inbucket.  This setting has no impact
-# on the availability of the underlying WebSocket.
-monitor.visible=true
-
-# How many historical message headers should be cached for display by new
-# monitor connections.  It does not limit the number of messages displayed by
-# the browser once the monitor is open; all freshly received messages will be
-# appended to the on screen list.  This setting also affects the underlying
-# API/WebSocket.
-monitor.history=30
-
-#############################################################################
-[datastore]
-
-# Path to the datastore, mail will be written into subdirectories
-path=%(datastore.dir)s
-
-# How many minutes after receipt should a message be stored until it's
-# automatically purged.  To retain messages until manually deleted, set this
-# to 0
-retention.minutes=10080
-
-# How many milliseconds to sleep after purging messages from a mailbox.
-# This should help reduce disk I/O when there are a large number of messages
-# to purge.
-retention.sleep.millis=100
-
-# Maximum number of messages we will store in a single mailbox. If this
-# number is exceeded, the oldest message in the box will be deleted each
-# time a new message is received for it.
-mailbox.message.cap=100

etc/inbucket.conf

@@ -1,129 +0,0 @@
-# inbucket.conf
-# Sample inbucket configuration
-
-#############################################################################
-[DEFAULT]
-
-# Not used directly, but is typically referenced below in %()s format.
-install.dir=.
-default.domain=inbucket.local
-
-#############################################################################
-[logging]
-
-# Options from least to most verbose: ERROR, WARN, INFO, TRACE
-level=INFO
-
-#############################################################################
-[smtp]
-
-# IPv4 address to listen for SMTP connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for SMTP connections on.
-ip4.port=2500
-
-# used in SMTP greeting
-domain=%(default.domain)s
-
-# optional: mail sent to accounts at this domain will not be stored,
-# for mixed use (content and load testing)
-#domain.nostore=bitbucket.local
-
-# Maximum number of RCPT TO: addresses we allow from clients, the SMTP
-# RFC recommends this be at least 100.
-max.recipients=100
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, SMTP RFC recommends at least 5 minutes (300 seconds).
-max.idle.seconds=300
-
-# Maximum allowable size of message body in bytes (including attachments)
-max.message.bytes=2048000
-
-# Should we place messages into the datastore, or just throw them away
-# (for load testing): true or false
-store.messages=true
-
-#############################################################################
-[pop3]
-
-# IPv4 address to listen for POP3 connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for POP3 connections on.
-ip4.port=1100
-
-# used in POP3 greeting
-domain=%(default.domain)s
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, POP3 RFC requires at least 10 minutes (600 seconds).
-max.idle.seconds=600
-
-#############################################################################
-[web]
-
-# IPv4 address to serve HTTP web interface on
-ip4.address=0.0.0.0
-
-# IPv4 port to serve HTTP web interface on
-ip4.port=9000
-
-# Name of web theme to use
-theme=bootstrap
-
-# Prompt displayed between the mailbox entry field and View button. Leave
-# empty or comment out to hide the prompt.
-mailbox.prompt=@inbucket
-
-# Path to the selected themes template files
-template.dir=%(install.dir)s/themes/%(theme)s/templates
-
-# Should we cache parsed templates (set to false during theme dev)
-template.cache=true
-
-# Path to the selected themes public (static) files
-public.dir=%(install.dir)s/themes/%(theme)s/public
-
-# Path to the greeting HTML displayed on front page, can be moved out of
-# installation dir for customization
-greeting.file=%(install.dir)s/themes/greeting.html
-
-# Key used to sign session cookie data so that it cannot be tampered with.
-# If this is left unset, Inbucket will generate a random key at startup
-# and previous sessions will be invalidated.
-#cookie.auth.key=secret-inbucket-session-cookie-key
-
-# Enable or disable the live message monitor tab for the web UI. This will let
-# anybody see all messages delivered to Inbucket.  This setting has no impact
-# on the availability of the underlying WebSocket.
-monitor.visible=true
-
-# How many historical message headers should be cached for display by new
-# monitor connections.  It does not limit the number of messages displayed by
-# the browser once the monitor is open; all freshly received messages will be
-# appended to the on screen list.  This setting also affects the underlying
-# API/WebSocket.
-monitor.history=30
-
-#############################################################################
-[datastore]
-
-# Path to the datastore, mail will be written into subdirectories
-path=/tmp/inbucket
-
-# How many minutes after receipt should a message be stored until it's
-# automatically purged.  To retain messages until manually deleted, set this
-# to 0
-retention.minutes=240
-
-# How many milliseconds to sleep after purging messages from a mailbox.
-# This should help reduce disk I/O when there are a large number of messages
-# to purge.
-retention.sleep.millis=100
-
-# Maximum number of messages we will store in a single mailbox. If this
-# number is exceeded, the oldest message in the box will be deleted each
-# time a new message is received for it.
-mailbox.message.cap=500

etc/linux/inbucket.service

@@ -0,0 +1,33 @@
+[Unit]
+Description=Inbucket Disposable Email Service
+After=network.target
+
+[Service]
+Type=simple
+User=daemon
+Group=daemon
+PermissionsStartOnly=true
+
+Environment=INBUCKET_LOGLEVEL=warn
+Environment=INBUCKET_SMTP_ADDR=0.0.0.0:2500
+Environment=INBUCKET_POP3_ADDR=0.0.0.0:1100
+Environment=INBUCKET_WEB_ADDR=0.0.0.0:9000
+Environment=INBUCKET_WEB_UIDIR=/usr/local/share/inbucket/ui
+Environment=INBUCKET_WEB_GREETINGFILE=/etc/inbucket/greeting.html
+Environment=INBUCKET_STORAGE_TYPE=file
+Environment=INBUCKET_STORAGE_PARAMS=path:/var/local/inbucket
+
+# Uncomment line below to use low numbered ports
+#ExecStartPre=/sbin/setcap 'cap_net_bind_service=+ep' /usr/local/bin/inbucket
+
+ExecStartPre=/bin/mkdir -p /var/local/inbucket
+ExecStartPre=/bin/chown daemon:daemon /var/local/inbucket
+
+ExecStart=/usr/local/bin/inbucket
+
+# Give SMTP connections time to drain
+TimeoutStopSec=20
+KillMode=mixed
+
+[Install]
+WantedBy=multi-user.target

etc/redhat/README

@@ -1,3 +0,0 @@
-Please see the RedHat installation guide on our website:
-
-http://www.inbucket.org/installation/redhat.html

etc/redhat/httpd-vhost.conf

@@ -1,17 +0,0 @@
-# Inbucket reverse proxy, Apache will forward requests from port 80
-# to Inbucket's built in web server on port 9000
-#
-# Replace SERVERFQDN with your servers fully qualified domain name
-<VirtualHost *:80>
-	ServerName SERVERFQDN
-	ProxyRequests off
-
-	<Proxy *>
-		Order allow,deny
-		Allow from all
-	</Proxy>
-
-	RewriteRule ^/$ http://SERVERFQDN:9000
-	ProxyPass / http://SERVERFQDN:9000/
-	ProxyPassReverse / http://SERVERFQDN:9000/
-</VirtualHost>

etc/redhat/inbucket-init.sh

@@ -1,117 +0,0 @@
-#!/bin/sh
-#
-# inbucket     Inbucket email testing service
-#
-# chkconfig: 2345 80 30
-# description: Inbucket is a disposable email service for testing email
-#              functionality of other applications.
-# processname: inbucket
-# pidfile: /var/run/inbucket/inbucket.pid
-
-### BEGIN INIT INFO
-# Provides: Inbucket service
-# Required-Start: $local_fs $network $remote_fs
-# Required-Stop: $local_fs $network $remote_fs
-# Default-Start: 2 3 4 5
-# Default-Stop: 0 1 6
-# Short-Description: start and stop inbucket
-# Description: Inbucket is a disposable email service for testing email
-#              functionality of other applications.
-#              moves mail from one machine to another.
-### END INIT INFO
-
-# Source function library.
-. /etc/rc.d/init.d/functions
-
-# Source networking configuration.
-. /etc/sysconfig/network
-
-RETVAL=0
-program=/opt/inbucket/inbucket
-prog=${program##*/}
-config=/etc/opt/inbucket.conf
-runas=inbucket
-
-lockfile=/var/lock/subsys/$prog
-pidfile=/var/run/$prog/$prog.pid
-logfile=/var/log/$prog.log
-
-conf_check() {
-    [ -x $program ] || exit 5
-    [ -f $config ] || exit 6
-}
-
-perms_check() {
-    mkdir -p /var/run/$prog
-    chown $runas: /var/run/$prog
-    touch $logfile
-    chown $runas: $logfile
-    # Allow bind to ports under 1024
-    setcap 'cap_net_bind_service=+ep' $program
-}
-
-start() {
-	[ "$EUID" != "0" ] && exit 4
-	# Check that networking is up.
-	[ ${NETWORKING} = "no" ] && exit 1
-	# Check config sanity
-	conf_check
-	perms_check
-	# Start daemon
-	echo -n $"Starting $prog: "
-	daemon --user $runas --pidfile $pidfile $program \
-	  -pidfile $pidfile -logfile $logfile $config \&
-	RETVAL=$?
-	[ $RETVAL -eq 0 ] && touch $lockfile
-        echo
-	return $RETVAL
-}
-
-stop() {
-	[ "$EUID" != "0" ] && exit 4
-	conf_check
-        # Stop daemon
-	echo -n $"Shutting down $prog: "
-	killproc -p "$pidfile" -d 15 "$program"
-	RETVAL=$?
-	[ $RETVAL -eq 0 ] && rm -f $lockfile $pidfile
-	echo
-	return $RETVAL
-}
-
-reload() {
-	[ "$EUID" != "0" ] && exit 4
-	echo -n $"Reloading $prog: "
-	killproc -p "$pidfile" "$program" -HUP
-	RETVAL=$?
-	echo
-	return $RETVAL
-}
-
-# See how we were called.
-case "$1" in
-  start)
-	[ -e $lockfile ] && exit 0
-	start
-	;;
-  stop)
-	[ -e $lockfile ] || exit 0
-	stop
-	;;
-  reload)
-	[ -e $lockfile ] || exit 0
-	reload
-	;;
-  restart|force-reload)
-	stop
-	start
-	;;
-  status)
-  	status -p $pidfile -l $(basename $lockfile) $prog
-	;;
-  *)
-	echo $"Usage: $0 {start|stop|restart|status}"
-	exit 2
-esac
-
-exit $?

etc/redhat/inbucket.logrotate

@@ -1,8 +0,0 @@
-/var/log/inbucket.log {
-  missingok
-  notifempty
-  create 0644 inbucket inbucket
-  postrotate
-    [ -x /bin/systemctl ] && /bin/systemctl reload inbucket >/dev/null 2>&1 || true
-  endscript
-}

etc/redhat/inbucket.service

@@ -1,20 +0,0 @@
-[Unit]
-Description=Inbucket Disposable Email Service
-After=network.target
-
-[Service]
-Type=simple
-User=inbucket
-Group=inbucket
-
-ExecStart=/opt/inbucket/inbucket -logfile /var/log/inbucket.log /etc/opt/inbucket.conf
-
-# Re-open log file after rotation
-ExecReload=/bin/kill -HUP $MAINPID
-
-# Give SMTP connections time to drain
-TimeoutStopSec=20
-KillMode=mixed
-
-[Install]
-WantedBy=multi-user.target

etc/swaks-tests/nonmime-html-inlined.raw

@@ -0,0 +1,393 @@
+Date: %DATE%
+To: %TO_ADDRESS%
+From: %FROM_ADDRESS%
+Subject: tutsplus responsive inlined CSS
+MIME-Version: 1.0
+Content-Type: text/html; charset="UTF-8"
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+  <!--[if !mso]><!-->
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+  <!--<![endif]-->
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title></title>
+  <!--[if (gte mso 9)|(IE)]>
+  <style type="text/css">
+    table {border-collapse: collapse !important;}
+  </style>
+  <![endif]-->
+</head>
+<body style="margin-top:0 !important;margin-bottom:0 !important;margin-right:0 !important;margin-left:0 !important;padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;background-color:#ffffff;" >
+  <center class="wrapper" style="width:100%;table-layout:fixed;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;" >
+    <div class="webkit" style="max-width:600px;margin-top:0;margin-bottom:0;margin-right:auto;margin-left:auto;" >
+      <!--[if (gte mso 9)|(IE)]>
+      <table width="600" align="center" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+      <tr>
+      <td style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+      <![endif]-->
+      <table class="outer" align="center" style="border-spacing:0;font-family:sans-serif;color:#333333;Margin:0 auto;width:100%;max-width:600px;" >
+        <tr>
+          <td class="full-width-image" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <img src="http://www.inbucket.org/email-assets/responsive/header.jpg" width="600" alt="" style="border-width:0;width:100%;max-width:600px;height:auto;" />
+          </td>
+        </tr>
+        <tr>
+          <td class="one-column" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+              <tr>
+                <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;text-align:left;" >
+                  <p class="h1" style="Margin:0;font-weight:bold;font-size:14px;Margin-bottom:10px;" >Lorem ipsum dolor sit amet</p>
+                    <p style="Margin:0;font-size:14px;Margin-bottom:10px;" >
+                      Compare to:
+                      <a href="http://tutsplus.github.io/creating-a-future-proof-responsive-email-without-media-queries/index.html" style="color:#ee6a56;text-decoration:underline;" >
+                      tutsplus sample</a>
+                    </p>
+
+                    <p style="Margin:0;font-size:14px;Margin-bottom:10px;" >Copyright (c) 2015, Envato Tuts+<br/>
+                    All rights reserved.</p>
+
+                    <p style="Margin:0;font-size:14px;Margin-bottom:10px;" >Redistribution and use in source and binary forms, with or without
+                    modification, are permitted provided that the following conditions are met:</p>
+
+                    <ul>
+                    <li>Redistributions of source code must retain the above copyright notice, this
+                      list of conditions and the following disclaimer.</li>
+
+                    <li>Redistributions in binary form must reproduce the above copyright notice,
+                      this list of conditions and the following disclaimer in the documentation
+                      and/or other materials provided with the distribution.</li>
+                    </ul>
+
+                    <p style="Margin:0;font-size:14px;Margin-bottom:10px;" >THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+                    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+                    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+                    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+                    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+                    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+                    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+                    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+                    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+                    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</p>
+                </td>
+              </tr>
+            </table>
+          </td>
+        </tr>
+        <tr>
+          <td class="two-column" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;text-align:center;font-size:0;" >
+            <!--[if (gte mso 9)|(IE)]>
+            <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+            <tr>
+            <td width="50%" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:300px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;" >
+                    <table class="contents" style="border-spacing:0;font-family:sans-serif;color:#333333;width:100%;font-size:14px;text-align:left;" >
+                      <tr>
+                        <td style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+                          <img src="http://www.inbucket.org/email-assets/responsive/two-column-01.jpg" width="280" alt="" style="border-width:0;width:100%;max-width:280px;height:auto;" />
+                        </td>
+                      </tr>
+                      <tr>
+                        <td class="text" style="padding-bottom:0;padding-right:0;padding-left:0;padding-top:10px;" >
+                          Maecenas sed ante pellentesque, posuere leo id, eleifend dolor. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.
+                        </td>
+                      </tr>
+                    </table>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="50%" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:300px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;" >
+                    <table class="contents" style="border-spacing:0;font-family:sans-serif;color:#333333;width:100%;font-size:14px;text-align:left;" >
+                      <tr>
+                        <td style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+                          <img src="http://www.inbucket.org/email-assets/responsive/two-column-02.jpg" width="280" alt="" style="border-width:0;width:100%;max-width:280px;height:auto;" />
+                        </td>
+                      </tr>
+                      <tr>
+                        <td class="text" style="padding-bottom:0;padding-right:0;padding-left:0;padding-top:10px;" >
+                          Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Maecenas sed ante pellentesque, posuere leo id, eleifend dolor.
+                        </td>
+                      </tr>
+                    </table>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td>
+            </tr>
+            </table>
+            <![endif]-->
+          </td>
+        </tr>
+        <tr>
+          <td class="three-column" style="padding-right:0;padding-left:0;text-align:center;font-size:0;padding-top:10px;padding-bottom:10px;" >
+            <!--[if (gte mso 9)|(IE)]>
+            <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+            <tr>
+            <td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;" >
+                    <table class="contents" style="border-spacing:0;font-family:sans-serif;color:#333333;width:100%;font-size:14px;text-align:center;" >
+                      <tr>
+                        <td style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+                          <img src="http://www.inbucket.org/email-assets/responsive/three-column-01.jpg" width="180" alt="" style="border-width:0;width:100%;max-width:180px;height:auto;" />
+                        </td>
+                      </tr>
+                      <tr>
+                        <td class="text" style="padding-bottom:0;padding-right:0;padding-left:0;padding-top:10px;" >
+                          Scelerisque congue eros eu posuere. Praesent in felis ut velit pretium lobortis rhoncus ut erat.
+                        </td>
+                      </tr>
+                    </table>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;" >
+                    <table class="contents" style="border-spacing:0;font-family:sans-serif;color:#333333;width:100%;font-size:14px;text-align:center;" >
+                      <tr>
+                        <td style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+                          <img src="http://www.inbucket.org/email-assets/responsive/three-column-02.jpg" width="180" alt="" style="border-width:0;width:100%;max-width:180px;height:auto;" />
+                        </td>
+                      </tr>
+                      <tr>
+                        <td class="text" style="padding-bottom:0;padding-right:0;padding-left:0;padding-top:10px;" >
+                          Maecenas sed ante pellentesque, posuere leo id, eleifend dolor.
+                        </td>
+                      </tr>
+                    </table>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;" >
+                    <table class="contents" style="border-spacing:0;font-family:sans-serif;color:#333333;width:100%;font-size:14px;text-align:center;" >
+                      <tr>
+                        <td style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+                          <img src="http://www.inbucket.org/email-assets/responsive/three-column-03.jpg" width="180" alt="" style="border-width:0;width:100%;max-width:180px;height:auto;" />
+                        </td>
+                      </tr>
+                      <tr>
+                        <td class="text" style="padding-bottom:0;padding-right:0;padding-left:0;padding-top:10px;" >
+                          Praesent laoreet malesuada cursus. Maecenas scelerisque congue eros eu posuere.
+                        </td>
+                      </tr>
+                    </table>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td>
+            </tr>
+            </table>
+            <![endif]-->
+          </td>
+        </tr>
+        <tr>
+          <td class="three-column" style="padding-right:0;padding-left:0;text-align:center;font-size:0;padding-top:10px;padding-bottom:10px;" >
+            <!--[if (gte mso 9)|(IE)]>
+            <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+            <tr>
+            <td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    <p class="h2" style="Margin:0;font-size:18px;font-weight:bold;Margin-bottom:12px;" >Fashion</p>
+                    <p style="Margin:0;" >Class eleifend aptent taciti sociosqu ad litora torquent conubia</p>
+                    <p style="Margin:0;" ><a href="#" style="color:#ee6a56;text-decoration:underline;" >Read requirements</a></p>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    <p class="h2" style="Margin:0;font-size:18px;font-weight:bold;Margin-bottom:12px;" >Photography</p>
+                    <p style="Margin:0;" >Maecenas sed ante pellentesque, posuere leo id, eleifend dolor</p>
+                    <p style="Margin:0;" ><a href="#" style="color:#ee6a56;text-decoration:underline;" >See examples</a></p>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    <p class="h2" style="Margin:0;font-size:18px;font-weight:bold;Margin-bottom:12px;" >Design</p>
+                    <p style="Margin:0;" >Class aptent taciti sociosqu eleifend ad litora per conubia nostra</p>
+                    <p style="Margin:0;" ><a href="#" style="color:#ee6a56;text-decoration:underline;" >See the winners</a></p>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td>
+            </tr>
+            <tr>
+            <td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    <p class="h2" style="Margin:0;font-size:18px;font-weight:bold;Margin-bottom:12px;" >Cooking</p>
+                    <p style="Margin:0;" >Class aptent taciti eleifend sociosqu ad litora torquent conubia</p>
+                    <p style="Margin:0;" ><a href="#" style="color:#ee6a56;text-decoration:underline;" >Read recipes</a></p>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    <p class="h2" style="Margin:0;font-size:18px;font-weight:bold;Margin-bottom:12px;" >Woodworking</p>
+                    <p style="Margin:0;" >Maecenas sed ante pellentesque, posuere leo id, eleifend dolor</p>
+                    <p style="Margin:0;" ><a href="#" style="color:#ee6a56;text-decoration:underline;" >See examples</a></p>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="200" valign="top" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column" style="width:100%;max-width:200px;display:inline-block;vertical-align:top;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    <p class="h2" style="Margin:0;font-size:18px;font-weight:bold;Margin-bottom:12px;" >Craft</p>
+                    <p style="Margin:0;" >Class aptent taciti sociosqu ad eleifend litora per conubia nostra</p>
+                    <p style="Margin:0;" ><a href="#" style="color:#ee6a56;text-decoration:underline;" >Vote now</a></p>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td>
+            </tr>
+            </table>
+            <![endif]-->
+          </td>
+        </tr>
+        <tr>
+          <td class="left-sidebar" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;text-align:center;font-size:0;" >
+            <!--[if (gte mso 9)|(IE)]>
+            <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+            <tr>
+            <td width="100" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column left" style="width:100%;display:inline-block;vertical-align:middle;max-width:100px;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;" >
+                    <img src="http://www.inbucket.org/email-assets/responsive/sidebar-01.jpg" width="80" alt="" style="border-width:0;" />
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="500" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column right" style="width:100%;display:inline-block;vertical-align:middle;max-width:500px;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    Praesent laoreet malesuada cursus. Maecenas scelerisque congue eros eu posuere. Praesent in felis ut velit pretium lobortis rhoncus ut erat. <a href="#" style="text-decoration:underline;color:#85ab70;" >Read&nbsp;on</a>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td>
+            </tr>
+            </table>
+            <![endif]-->
+          </td>
+        </tr>
+        <tr>
+          <td class="right-sidebar" dir="rtl" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;text-align:center;font-size:0;" >
+            <!--[if (gte mso 9)|(IE)]>
+            <table width="100%" dir="rtl" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+            <tr>
+            <td width="100" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column left" dir="ltr" style="width:100%;display:inline-block;vertical-align:middle;max-width:100px;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    <img src="http://www.inbucket.org/email-assets/responsive/sidebar-02.jpg" width="80" alt="" style="border-width:0;" />
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td><td width="500" style="padding-top:0;padding-bottom:0;padding-right:0;padding-left:0;" >
+            <![endif]-->
+            <div class="column right" dir="ltr" style="width:100%;display:inline-block;vertical-align:middle;max-width:500px;" >
+              <table width="100%" style="border-spacing:0;font-family:sans-serif;color:#333333;" >
+                <tr>
+                  <td class="inner contents" style="padding-top:10px;padding-bottom:10px;padding-right:10px;padding-left:10px;width:100%;font-size:14px;text-align:center;" >
+                    Maecenas sed ante pellentesque, posuere leo id, eleifend dolor. Class aptent taciti sociosqu ad litora torquent per conubia nostra. <a href="#" style="text-decoration:underline;color:#70bbd9;" >Per&nbsp;inceptos</a>
+                  </td>
+                </tr>
+              </table>
+            </div>
+            <!--[if (gte mso 9)|(IE)]>
+            </td>
+            </tr>
+            </table>
+            <![endif]-->
+          </td>
+        </tr>
+      </table>
+      <!--[if (gte mso 9)|(IE)]>
+      </td>
+      </tr>
+      </table>
+      <![endif]-->
+    </div>
+  </center>
+</body>
+</html>

etc/swaks-tests/nonmime-html-responsive.raw

@@ -1,7 +1,7 @@
 Date: %DATE%
 To: %TO_ADDRESS%
 From: %FROM_ADDRESS%
-Subject: tutsplus responsive
+Subject: tutsplus responsive external CSS
 MIME-Version: 1.0
 Content-Type: text/html; charset="UTF-8"
 

etc/swaks-tests/nonmime-html.raw

@@ -0,0 +1,10 @@
+Date: %DATE%
+To: %TO_ADDRESS%
+From: %FROM_ADDRESS%
+Subject: Swaks HTML
+MIME-Version: 1.0
+Content-Type: text/html; charset="UTF-8"
+
+<p style="font-family: 'Courier New', Courier, monospace;">
+  This is a test of <b>HTML</b> at the <i>top</i> level.
+</p>

etc/swaks-tests/run-tests.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # run-tests.sh
 # description: Generate test emails for Inbucket
 
@@ -53,5 +53,6 @@ swaks $* --data gmail.raw
 # Outlook test
 swaks $* --data outlook.raw
 
-# Nonemime responsive HTML test
+# Non-mime responsive HTML test
 swaks $* --data nonmime-html-responsive.raw
+swaks $* --data nonmime-html-inlined.raw

etc/travis-deploy.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+# travis-deploy.sh
+# description: Trigger goreleaser deployment in correct build scenarios
+
+set -eo pipefail
+set -x
+
+if [[ "$TRAVIS_GO_VERSION" == "$DEPLOY_WITH_MAJOR."* ]]; then
+  curl -sL https://git.io/goreleaser | bash
+fi

etc/ubuntu/README

@@ -1,3 +0,0 @@
-Please see the Ubuntu installation guide on our website:
-
-http://www.inbucket.org/installation/ubuntu.html

etc/ubuntu/inbucket-upstart.conf

@@ -1,29 +0,0 @@
-# inbucket - disposable email service
-#
-# Inbucket is an SMTP server with a web interface for testing application
-# functionality
-
-description "inbucket - disposable email service"
-author      "http://jhillyerd.github.com/inbucket"
-
-start on (local-filesystems and net-device-up IFACE!=lo)
-stop on runlevel [!2345]
-
-env program=/opt/inbucket/inbucket
-env config=/etc/opt/inbucket.conf
-env logfile=/var/log/inbucket.log
-env runas=inbucket
-
-# Give SMTP connections time to drain
-kill timeout 20
-
-pre-start script
-  [ -x $program ]
-  [ -r $config ]
-  touch $logfile
-  chown $runas: $logfile
-  # Allow bind to ports under 1024
-  setcap 'cap_net_bind_service=+ep' $program
-end script
-
-exec start-stop-daemon --start --chuid $runas --exec $program -- -logfile $logfile $config

etc/ubuntu/inbucket.logrotate

@@ -1,8 +0,0 @@
-/var/log/inbucket.log {
-  missingok
-  notifempty
-  create 0644 inbucket inbucket
-  postrotate
-    [ -x /bin/systemctl ] && /bin/systemctl reload inbucket >/dev/null 2>&1 || true
-  endscript
-}

etc/ubuntu/inbucket.service

@@ -1,20 +0,0 @@
-[Unit]
-Description=Inbucket Disposable Email Service
-After=network.target
-
-[Service]
-Type=simple
-User=inbucket
-Group=inbucket
-
-ExecStart=/opt/inbucket/inbucket -logfile /var/log/inbucket.log /etc/opt/inbucket.conf
-
-# Re-open log file after rotation
-ExecReload=/bin/kill -HUP $MAINPID
-
-# Give SMTP connections time to drain
-TimeoutStopSec=20
-KillMode=mixed
-
-[Install]
-WantedBy=multi-user.target

etc/unix-sample.conf

@@ -1,129 +0,0 @@
-# inbucket.conf
-# Sample inbucket configuration
-
-#############################################################################
-[DEFAULT]
-
-# Not used directly, but is typically referenced below in %()s format.
-install.dir=/opt/inbucket
-default.domain=inbucket.local
-
-#############################################################################
-[logging]
-
-# Options from least to most verbose: ERROR, WARN, INFO, TRACE
-level=INFO
-
-#############################################################################
-[smtp]
-
-# IPv4 address to listen for SMTP connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for SMTP connections on.
-ip4.port=25
-
-# used in SMTP greeting
-domain=%(default.domain)s
-
-# optional: mail sent to accounts at this domain will not be stored,
-# for mixed use (content and load testing)
-#domain.nostore=bitbucket.local
-
-# Maximum number of RCPT TO: addresses we allow from clients, the SMTP
-# RFC recommends this be at least 100.
-max.recipients=100
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, SMTP RFC recommends at least 5 minutes (300 seconds).
-max.idle.seconds=300
-
-# Maximum allowable size of message body in bytes (including attachments)
-max.message.bytes=2048000
-
-# Should we place messages into the datastore, or just throw them away
-# (for load testing): true or false
-store.messages=true
-
-#############################################################################
-[pop3]
-
-# IPv4 address to listen for POP3 connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for POP3 connections on.
-ip4.port=110
-
-# used in POP3 greeting
-domain=%(default.domain)s
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, POP3 RFC requires at least 10 minutes (600 seconds).
-max.idle.seconds=600
-
-#############################################################################
-[web]
-
-# IPv4 address to serve HTTP web interface on
-ip4.address=0.0.0.0
-
-# IPv4 port to serve HTTP web interface on
-ip4.port=80
-
-# Name of web theme to use
-theme=bootstrap
-
-# Prompt displayed between the mailbox entry field and View button. Leave
-# empty or comment out to hide the prompt.
-mailbox.prompt=@inbucket
-
-# Path to the selected themes template files
-template.dir=%(install.dir)s/themes/%(theme)s/templates
-
-# Should we cache parsed templates (set to false during theme dev)
-template.cache=true
-
-# Path to the selected themes public (static) files
-public.dir=%(install.dir)s/themes/%(theme)s/public
-
-# Path to the greeting HTML displayed on front page, can be moved out of
-# installation dir for customization
-greeting.file=%(install.dir)s/themes/greeting.html
-
-# Key used to sign session cookie data so that it cannot be tampered with.
-# If this is left unset, Inbucket will generate a random key at startup
-# and previous sessions will be invalidated.
-#cookie.auth.key=secret-inbucket-session-cookie-key
-
-# Enable or disable the live message monitor tab for the web UI. This will let
-# anybody see all messages delivered to Inbucket.  This setting has no impact
-# on the availability of the underlying WebSocket.
-monitor.visible=true
-
-# How many historical message headers should be cached for display by new
-# monitor connections.  It does not limit the number of messages displayed by
-# the browser once the monitor is open; all freshly received messages will be
-# appended to the on screen list.  This setting also affects the underlying
-# API/WebSocket.
-monitor.history=30
-
-#############################################################################
-[datastore]
-
-# Path to the datastore, mail will be written into subdirectories
-path=/var/opt/inbucket
-
-# How many minutes after receipt should a message be stored until it's
-# automatically purged.  To retain messages until manually deleted, set this
-# to 0
-retention.minutes=240
-
-# How many milliseconds to sleep after purging messages from a mailbox.
-# This should help reduce disk I/O when there are a large number of messages
-# to purge.
-retention.sleep.millis=100
-
-# Maximum number of messages we will store in a single mailbox. If this
-# number is exceeded, the oldest message in the box will be deleted each
-# time a new message is received for it.
-mailbox.message.cap=500

etc/win-sample.conf

@@ -1,129 +0,0 @@
-# win-sample.conf
-# Sample inbucket configuration for Windows
-
-#############################################################################
-[DEFAULT]
-
-# Not used directly, but is typically referenced below in %()s format.
-install.dir=.
-default.domain=inbucket.local
-
-#############################################################################
-[logging]
-
-# Options from least to most verbose: ERROR, WARN, INFO, TRACE
-level=INFO
-
-#############################################################################
-[smtp]
-
-# IPv4 address to listen for SMTP connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for SMTP connections on.
-ip4.port=2500
-
-# used in SMTP greeting
-domain=%(default.domain)s
-
-# optional: mail sent to accounts at this domain will not be stored,
-# for mixed use (content and load testing)
-#domain.nostore=bitbucket.local
-
-# Maximum number of RCPT TO: addresses we allow from clients, the SMTP
-# RFC recommends this be at least 100.
-max.recipients=100
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, SMTP RFC recommends at least 5 minutes (300 seconds).
-max.idle.seconds=300
-
-# Maximum allowable size of message body in bytes (including attachments)
-max.message.bytes=2048000
-
-# Should we place messages into the datastore, or just throw them away
-# (for load testing): true or false
-store.messages=true
-
-#############################################################################
-[pop3]
-
-# IPv4 address to listen for POP3 connections on.
-ip4.address=0.0.0.0
-
-# IPv4 port to listen for POP3 connections on.
-ip4.port=1100
-
-# used in POP3 greeting
-domain=%(default.domain)s
-
-# How long we allow a network connection to be idle before hanging up on the
-# client, POP3 RFC requires at least 10 minutes (600 seconds).
-max.idle.seconds=600
-
-#############################################################################
-[web]
-
-# IPv4 address to serve HTTP web interface on
-ip4.address=0.0.0.0
-
-# IPv4 port to serve HTTP web interface on
-ip4.port=9000
-
-# Name of web theme to use
-theme=bootstrap
-
-# Prompt displayed between the mailbox entry field and View button. Leave
-# empty or comment out to hide the prompt.
-mailbox.prompt=@inbucket
-
-# Path to the selected themes template files
-template.dir=%(install.dir)s\themes\%(theme)s\templates
-
-# Should we cache parsed templates (set to false during theme dev)
-template.cache=true
-
-# Path to the selected themes public (static) files
-public.dir=%(install.dir)s\themes\%(theme)s\public
-
-# Path to the greeting HTML displayed on front page, can be moved out of
-# installation dir for customization
-greeting.file=%(install.dir)s\themes\greeting.html
-
-# Key used to sign session cookie data so that it cannot be tampered with.
-# If this is left unset, Inbucket will generate a random key at startup
-# and previous sessions will be invalidated.
-#cookie.auth.key=secret-inbucket-session-cookie-key
-
-# Enable or disable the live message monitor tab for the web UI. This will let
-# anybody see all messages delivered to Inbucket.  This setting has no impact
-# on the availability of the underlying WebSocket.
-monitor.visible=true
-
-# How many historical message headers should be cached for display by new
-# monitor connections.  It does not limit the number of messages displayed by
-# the browser once the monitor is open; all freshly received messages will be
-# appended to the on screen list.  This setting also affects the underlying
-# API/WebSocket.
-monitor.history=30
-
-#############################################################################
-[datastore]
-
-# Path to the datastore, mail will be written into subdirectories
-path=.\inbucket-data
-
-# How many minutes after receipt should a message be stored until it's
-# automatically purged.  To retain messages until manually deleted, set this
-# to 0
-retention.minutes=240
-
-# How many milliseconds to sleep after purging messages from a mailbox.
-# This should help reduce disk I/O when there are a large number of messages
-# to purge.
-retention.sleep.millis=100
-
-# Maximum number of messages we will store in a single mailbox. If this
-# number is exceeded, the oldest message in the box will be deleted each
-# time a new message is received for it.
-mailbox.message.cap=500

inbucket.bat

@@ -1 +0,0 @@
-inbucket.exe etc\win-sample.conf

inbucket.go

@@ -1,183 +0,0 @@
-// main is the inbucket daemon launcher
-package main
-
-import (
-	"context"
-	"expvar"
-	"flag"
-	"fmt"
-	"os"
-	"os/signal"
-	"runtime"
-	"syscall"
-	"time"
-
-	"github.com/jhillyerd/inbucket/config"
-	"github.com/jhillyerd/inbucket/httpd"
-	"github.com/jhillyerd/inbucket/log"
-	"github.com/jhillyerd/inbucket/msghub"
-	"github.com/jhillyerd/inbucket/pop3d"
-	"github.com/jhillyerd/inbucket/rest"
-	"github.com/jhillyerd/inbucket/smtpd"
-	"github.com/jhillyerd/inbucket/webui"
-)
-
-var (
-	// VERSION contains the build version number, populated during linking by goxc
-	VERSION = "1.2.0-rc1"
-
-	// BUILDDATE contains the build date, populated during linking by goxc
-	BUILDDATE = "undefined"
-
-	// Command line flags
-	help    = flag.Bool("help", false, "Displays this help")
-	pidfile = flag.String("pidfile", "none", "Write our PID into the specified file")
-	logfile = flag.String("logfile", "stderr", "Write out log into the specified file")
-
-	// shutdownChan - close it to tell Inbucket to shut down cleanly
-	shutdownChan = make(chan bool)
-
-	// Server instances
-	smtpServer *smtpd.Server
-	pop3Server *pop3d.Server
-)
-
-func init() {
-	flag.Usage = func() {
-		fmt.Fprintln(os.Stderr, "Usage of inbucket [options] <conf file>:")
-		flag.PrintDefaults()
-	}
-
-	// Server uptime for status page
-	startTime := time.Now()
-	expvar.Publish("uptime", expvar.Func(func() interface{} {
-		return time.Since(startTime) / time.Second
-	}))
-
-	// Goroutine count for status page
-	expvar.Publish("goroutines", expvar.Func(func() interface{} {
-		return runtime.NumGoroutine()
-	}))
-}
-
-func main() {
-	config.Version = VERSION
-	config.BuildDate = BUILDDATE
-
-	flag.Parse()
-	if *help {
-		flag.Usage()
-		return
-	}
-
-	// Root context
-	rootCtx, rootCancel := context.WithCancel(context.Background())
-
-	// Load & Parse config
-	if flag.NArg() != 1 {
-		flag.Usage()
-		os.Exit(1)
-	}
-	err := config.LoadConfig(flag.Arg(0))
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Failed to parse config: %v\n", err)
-		os.Exit(1)
-	}
-
-	// Setup signal handler
-	sigChan := make(chan os.Signal)
-	signal.Notify(sigChan, syscall.SIGHUP, syscall.SIGTERM, syscall.SIGINT)
-
-	// Initialize logging
-	log.SetLogLevel(config.GetLogLevel())
-	if err := log.Initialize(*logfile); err != nil {
-		fmt.Fprintf(os.Stderr, "%v", err)
-		os.Exit(1)
-	}
-	defer log.Close()
-
-	log.Infof("Inbucket %v (%v) starting...", config.Version, config.BuildDate)
-
-	// Write pidfile if requested
-	if *pidfile != "none" {
-		pidf, err := os.Create(*pidfile)
-		if err != nil {
-			log.Errorf("Failed to create %q: %v", *pidfile, err)
-			os.Exit(1)
-		}
-		fmt.Fprintf(pidf, "%v\n", os.Getpid())
-		if err := pidf.Close(); err != nil {
-			log.Errorf("Failed to close PID file %q: %v", *pidfile, err)
-		}
-	}
-
-	// Create message hub
-	msgHub := msghub.New(rootCtx, config.GetWebConfig().MonitorHistory)
-
-	// Grab our datastore
-	ds := smtpd.DefaultFileDataStore()
-
-	// Start HTTP server
-	httpd.Initialize(config.GetWebConfig(), shutdownChan, ds, msgHub)
-	webui.SetupRoutes(httpd.Router)
-	rest.SetupRoutes(httpd.Router)
-	go httpd.Start(rootCtx)
-
-	// Start POP3 server
-	// TODO pass datastore
-	pop3Server = pop3d.New(shutdownChan)
-	go pop3Server.Start(rootCtx)
-
-	// Startup SMTP server
-	smtpServer = smtpd.NewServer(config.GetSMTPConfig(), shutdownChan, ds, msgHub)
-	go smtpServer.Start(rootCtx)
-
-	// Loop forever waiting for signals or shutdown channel
-signalLoop:
-	for {
-		select {
-		case sig := <-sigChan:
-			switch sig {
-			case syscall.SIGHUP:
-				log.Infof("Recieved SIGHUP, cycling logfile")
-				log.Rotate()
-			case syscall.SIGINT:
-				// Shutdown requested
-				log.Infof("Received SIGINT, shutting down")
-				close(shutdownChan)
-			case syscall.SIGTERM:
-				// Shutdown requested
-				log.Infof("Received SIGTERM, shutting down")
-				close(shutdownChan)
-			}
-		case _ = <-shutdownChan:
-			rootCancel()
-			break signalLoop
-		}
-	}
-
-	// Wait for active connections to finish
-	go timedExit()
-	smtpServer.Drain()
-	pop3Server.Drain()
-
-	removePIDFile()
-}
-
-// removePIDFile removes the PID file if created
-func removePIDFile() {
-	if *pidfile != "none" {
-		if err := os.Remove(*pidfile); err != nil {
-			log.Errorf("Failed to remove %q: %v", *pidfile, err)
-		}
-	}
-}
-
-// timedExit is called as a goroutine during shutdown, it will force an exit
-// after 15 seconds
-func timedExit() {
-	time.Sleep(15 * time.Second)
-	log.Errorf("Clean shutdown took too long, forcing exit")
-	removePIDFile()
-	os.Exit(0)
-}

log/logging.go

@@ -1,145 +0,0 @@
-package log
-
-import (
-	"fmt"
-	golog "log"
-	"os"
-	"strings"
-)
-
-// Level is used to indicate the severity of a log entry
-type Level int
-
-const (
-	// ERROR indicates a significant problem was encountered
-	ERROR Level = iota
-	// WARN indicates something that may be a problem
-	WARN
-	// INFO indicates a purely informational log entry
-	INFO
-	// TRACE entries are meant for development purposes only
-	TRACE
-)
-
-var (
-	// MaxLevel is the highest Level we will log (max TRACE, min ERROR)
-	MaxLevel = TRACE
-
-	// logfname is the name of the logfile
-	logfname string
-
-	// logf is the file we send log output to, will be nil for stderr or stdout
-	logf *os.File
-)
-
-// Initialize logging.  If logfile is equal to "stderr" or "stdout", then
-// we will log to that output stream.  Otherwise the specificed file will
-// opened for writing, and all log data will be placed in it.
-func Initialize(logfile string) error {
-	if logfile != "stderr" {
-		// stderr is the go logging default
-		if logfile == "stdout" {
-			// set to stdout
-			golog.SetOutput(os.Stdout)
-		} else {
-			logfname = logfile
-			if err := openLogFile(); err != nil {
-				return err
-			}
-			// Platform specific
-			closeStdin()
-		}
-	}
-	return nil
-}
-
-// SetLogLevel sets MaxLevel based on the provided string
-func SetLogLevel(level string) (ok bool) {
-	switch strings.ToUpper(level) {
-	case "ERROR":
-		MaxLevel = ERROR
-	case "WARN":
-		MaxLevel = WARN
-	case "INFO":
-		MaxLevel = INFO
-	case "TRACE":
-		MaxLevel = TRACE
-	default:
-		Errorf("Unknown log level requested: " + level)
-		return false
-	}
-	return true
-}
-
-// Errorf logs a message to the 'standard' Logger (always), accepts format strings
-func Errorf(msg string, args ...interface{}) {
-	msg = "[ERROR] " + msg
-	golog.Printf(msg, args...)
-}
-
-// Warnf logs a message to the 'standard' Logger if MaxLevel is >= WARN, accepts format strings
-func Warnf(msg string, args ...interface{}) {
-	if MaxLevel >= WARN {
-		msg = "[WARN ] " + msg
-		golog.Printf(msg, args...)
-	}
-}
-
-// Infof logs a message to the 'standard' Logger if MaxLevel is >= INFO, accepts format strings
-func Infof(msg string, args ...interface{}) {
-	if MaxLevel >= INFO {
-		msg = "[INFO ] " + msg
-		golog.Printf(msg, args...)
-	}
-}
-
-// Tracef logs a message to the 'standard' Logger if MaxLevel is >= TRACE, accepts format strings
-func Tracef(msg string, args ...interface{}) {
-	if MaxLevel >= TRACE {
-		msg = "[TRACE] " + msg
-		golog.Printf(msg, args...)
-	}
-}
-
-// Rotate closes the current log file, then reopens it.  This gives an external
-// log rotation system the opportunity to move the existing log file out of the
-// way and have Inbucket create a new one.
-func Rotate() {
-	// Rotate logs if configured
-	if logf != nil {
-		closeLogFile()
-		// There is nothing we can do if the log open fails
-		_ = openLogFile()
-	} else {
-		Infof("Ignoring SIGHUP, logfile not configured")
-	}
-}
-
-// Close the log file if we have one open
-func Close() {
-	if logf != nil {
-		closeLogFile()
-	}
-}
-
-// openLogFile creates or appends to the logfile passed on commandline
-func openLogFile() error {
-	// use specified log file
-	var err error
-	logf, err = os.OpenFile(logfname, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
-	if err != nil {
-		return fmt.Errorf("Failed to create %v: %v\n", logfname, err)
-	}
-	golog.SetOutput(logf)
-	Tracef("Opened new logfile")
-	// Platform specific
-	reassignStdout()
-	return nil
-}
-
-// closeLogFile closes the current logfile
-func closeLogFile() {
-	Tracef("Closing logfile")
-	// We are never in a situation where we can do anything about failing to close
-	_ = logf.Close()
-}

log/stdout_unix.go

@@ -1,31 +0,0 @@
-// +build !windows
-
-package log
-
-import (
-	"golang.org/x/sys/unix"
-	"os"
-)
-
-// closeStdin will close stdin on Unix platforms - this is standard practice
-// for daemons
-func closeStdin() {
-	if err := os.Stdin.Close(); err != nil {
-		// Not a fatal error
-		Errorf("Failed to close os.Stdin during log setup")
-	}
-}
-
-// reassignStdout points stdout/stderr to our logfile on systems that support
-// the Dup2 syscall per https://github.com/golang/go/issues/325
-func reassignStdout() {
-	Tracef("Unix reassignStdout()")
-	if err := unix.Dup2(int(logf.Fd()), 1); err != nil {
-		// Not considered fatal
-		Errorf("Failed to re-assign stdout to logfile: %v", err)
-	}
-	if err := unix.Dup2(int(logf.Fd()), 2); err != nil {
-		// Not considered fatal
-		Errorf("Failed to re-assign stderr to logfile: %v", err)
-	}
-}

log/stdout_windows.go

@@ -1,37 +0,0 @@
-// +build windows
-
-package log
-
-import (
-	"os"
-)
-
-var stdOutsClosed = false
-
-// closeStdin does nothing on Windows, it would always fail
-func closeStdin() {
-	// Nop
-}
-
-// reassignStdout points stdout/stderr to our logfile on systems that do not
-// support the Dup2 syscall
-func reassignStdout() {
-	Tracef("Windows reassignStdout()")
-	if !stdOutsClosed {
-		// Close std* streams to prevent accidental output, they will be redirected to
-		// our logfile below
-
-		// Warning: this will hide panic() output, sorry Windows users
-		if err := os.Stderr.Close(); err != nil {
-			// Not considered fatal
-			Errorf("Failed to close os.Stderr during log setup")
-		}
-		if err := os.Stdin.Close(); err != nil {
-			// Not considered fatal
-			Errorf("Failed to close os.Stdin during log setup")
-		}
-		os.Stdout = logf
-		os.Stderr = logf
-		stdOutsClosed = true
-	}
-}

pkg/config/config.go

@@ -0,0 +1,130 @@
+package config
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strings"
+	"text/tabwriter"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/stringutil"
+	"github.com/kelseyhightower/envconfig"
+)
+
+const (
+	prefix      = "inbucket"
+	tableFormat = `Inbucket is configured via the environment. The following environment variables
+can be used:
+
+KEY	DEFAULT	DESCRIPTION
+{{range .}}{{usage_key .}}	{{usage_default .}}	{{usage_description .}}
+{{end}}`
+)
+
+var (
+	// Version of this build, set by main
+	Version = ""
+
+	// BuildDate for this build, set by main
+	BuildDate = ""
+)
+
+// mbNaming represents a mailbox naming strategy.
+type mbNaming int
+
+// Mailbox naming strategies.
+const (
+	UnknownNaming mbNaming = iota
+	LocalNaming
+	FullNaming
+)
+
+// Decode a naming strategy from string.
+func (n *mbNaming) Decode(v string) error {
+	switch strings.ToLower(v) {
+	case "local":
+		*n = LocalNaming
+	case "full":
+		*n = FullNaming
+	default:
+		return fmt.Errorf("Unknown MailboxNaming strategy: %q", v)
+	}
+	return nil
+}
+
+// Root contains global configuration, and structs with for specific sub-systems.
+type Root struct {
+	LogLevel      string   `required:"true" default:"info" desc:"debug, info, warn, or error"`
+	MailboxNaming mbNaming `required:"true" default:"local" desc:"Use local or full addressing"`
+	SMTP          SMTP
+	POP3          POP3
+	Web           Web
+	Storage       Storage
+}
+
+// SMTP contains the SMTP server configuration.
+type SMTP struct {
+	Addr            string        `required:"true" default:"0.0.0.0:2500" desc:"SMTP server IP4 host:port"`
+	Domain          string        `required:"true" default:"inbucket" desc:"HELO domain"`
+	MaxRecipients   int           `required:"true" default:"200" desc:"Maximum RCPT TO per message"`
+	MaxMessageBytes int           `required:"true" default:"10240000" desc:"Maximum message size"`
+	DefaultAccept   bool          `required:"true" default:"true" desc:"Accept all mail by default?"`
+	AcceptDomains   []string      `desc:"Domains to accept mail for"`
+	RejectDomains   []string      `desc:"Domains to reject mail for"`
+	DefaultStore    bool          `required:"true" default:"true" desc:"Store all mail by default?"`
+	StoreDomains    []string      `desc:"Domains to store mail for"`
+	DiscardDomains  []string      `desc:"Domains to discard mail for"`
+	Timeout         time.Duration `required:"true" default:"300s" desc:"Idle network timeout"`
+	Debug           bool          `ignored:"true"`
+}
+
+// POP3 contains the POP3 server configuration.
+type POP3 struct {
+	Addr    string        `required:"true" default:"0.0.0.0:1100" desc:"POP3 server IP4 host:port"`
+	Domain  string        `required:"true" default:"inbucket" desc:"HELLO domain"`
+	Timeout time.Duration `required:"true" default:"600s" desc:"Idle network timeout"`
+	Debug   bool          `ignored:"true"`
+}
+
+// Web contains the HTTP server configuration.
+type Web struct {
+	Addr           string `required:"true" default:"0.0.0.0:9000" desc:"Web server IP4 host:port"`
+	UIDir          string `required:"true" default:"ui" desc:"User interface dir"`
+	GreetingFile   string `required:"true" default:"ui/greeting.html" desc:"Home page greeting HTML"`
+	TemplateCache  bool   `required:"true" default:"true" desc:"Cache templates after first use?"`
+	MailboxPrompt  string `required:"true" default:"@inbucket" desc:"Prompt next to mailbox input"`
+	CookieAuthKey  string `desc:"Session cipher key (text)"`
+	MonitorVisible bool   `required:"true" default:"true" desc:"Show monitor tab in UI?"`
+	MonitorHistory int    `required:"true" default:"30" desc:"Monitor remembered messages"`
+}
+
+// Storage contains the mail store configuration.
+type Storage struct {
+	Type            string            `required:"true" default:"memory" desc:"Storage impl: file or memory"`
+	Params          map[string]string `desc:"Storage impl parameters, see docs."`
+	RetentionPeriod time.Duration     `required:"true" default:"24h" desc:"Duration to retain messages"`
+	RetentionSleep  time.Duration     `required:"true" default:"50ms" desc:"Duration to sleep between mailboxes"`
+	MailboxMsgCap   int               `required:"true" default:"500" desc:"Maximum messages per mailbox"`
+}
+
+// Process loads and parses configuration from the environment.
+func Process() (*Root, error) {
+	c := &Root{}
+	err := envconfig.Process(prefix, c)
+	c.LogLevel = strings.ToLower(c.LogLevel)
+	stringutil.SliceToLower(c.SMTP.AcceptDomains)
+	stringutil.SliceToLower(c.SMTP.RejectDomains)
+	stringutil.SliceToLower(c.SMTP.StoreDomains)
+	stringutil.SliceToLower(c.SMTP.DiscardDomains)
+	return c, err
+}
+
+// Usage prints out the envconfig usage to Stderr.
+func Usage() {
+	tabs := tabwriter.NewWriter(os.Stderr, 1, 0, 4, ' ', 0)
+	if err := envconfig.Usagef(prefix, &Root{}, tabs, tableFormat); err != nil {
+		log.Fatalf("Unable to parse env config: %v", err)
+	}
+	tabs.Flush()
+}

pkg/message/manager.go

@@ -0,0 +1,174 @@
+package message
+
+import (
+	"bytes"
+	"io"
+	"net/mail"
+	"strings"
+	"time"
+
+	"github.com/jhillyerd/enmime"
+	"github.com/jhillyerd/inbucket/pkg/msghub"
+	"github.com/jhillyerd/inbucket/pkg/policy"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/stringutil"
+	"github.com/rs/zerolog/log"
+)
+
+// Manager is the interface controllers use to interact with messages.
+type Manager interface {
+	Deliver(
+		to *policy.Recipient,
+		from string,
+		recipients []*policy.Recipient,
+		prefix string,
+		content []byte,
+	) (id string, err error)
+	GetMetadata(mailbox string) ([]*Metadata, error)
+	GetMessage(mailbox, id string) (*Message, error)
+	MarkSeen(mailbox, id string) error
+	PurgeMessages(mailbox string) error
+	RemoveMessage(mailbox, id string) error
+	SourceReader(mailbox, id string) (io.ReadCloser, error)
+	MailboxForAddress(address string) (string, error)
+}
+
+// StoreManager is a message Manager backed by the storage.Store.
+type StoreManager struct {
+	AddrPolicy *policy.Addressing
+	Store      storage.Store
+	Hub        *msghub.Hub
+}
+
+// Deliver submits a new message to the store.
+func (s *StoreManager) Deliver(
+	to *policy.Recipient,
+	from string,
+	recipients []*policy.Recipient,
+	prefix string,
+	source []byte,
+) (string, error) {
+	// TODO enmime is too heavy for this step, only need header.
+	// Go's header parsing isn't good enough, so this is blocked on enmime issue #64.
+	env, err := enmime.ReadEnvelope(bytes.NewReader(source))
+	if err != nil {
+		return "", err
+	}
+	fromaddr, err := env.AddressList("From")
+	if err != nil || len(fromaddr) == 0 {
+		fromaddr = []*mail.Address{{Address: from}}
+	}
+	toaddr, err := env.AddressList("To")
+	if err != nil {
+		toaddr = make([]*mail.Address, len(recipients))
+		for i, torecip := range recipients {
+			toaddr[i] = &torecip.Address
+		}
+	}
+	log.Debug().Str("module", "message").Str("mailbox", to.Mailbox).Msg("Delivering message")
+	delivery := &Delivery{
+		Meta: Metadata{
+			Mailbox: to.Mailbox,
+			From:    fromaddr[0],
+			To:      toaddr,
+			Date:    time.Now(),
+			Subject: env.GetHeader("Subject"),
+		},
+		Reader: io.MultiReader(strings.NewReader(prefix), bytes.NewReader(source)),
+	}
+	id, err := s.Store.AddMessage(delivery)
+	if err != nil {
+		return "", err
+	}
+	if s.Hub != nil {
+		// Broadcast message information.
+		broadcast := msghub.Message{
+			Mailbox: to.Mailbox,
+			ID:      id,
+			From:    delivery.From().String(),
+			To:      stringutil.StringAddressList(delivery.To()),
+			Subject: delivery.Subject(),
+			Date:    delivery.Date(),
+			Size:    delivery.Size(),
+		}
+		s.Hub.Dispatch(broadcast)
+	}
+	return id, nil
+}
+
+// GetMetadata returns a slice of metadata for the specified mailbox.
+func (s *StoreManager) GetMetadata(mailbox string) ([]*Metadata, error) {
+	messages, err := s.Store.GetMessages(mailbox)
+	if err != nil {
+		return nil, err
+	}
+	metas := make([]*Metadata, len(messages))
+	for i, sm := range messages {
+		metas[i] = makeMetadata(sm)
+	}
+	return metas, nil
+}
+
+// GetMessage returns the specified message.
+func (s *StoreManager) GetMessage(mailbox, id string) (*Message, error) {
+	sm, err := s.Store.GetMessage(mailbox, id)
+	if err != nil || sm == nil {
+		return nil, err
+	}
+	r, err := sm.Source()
+	if err != nil {
+		return nil, err
+	}
+	env, err := enmime.ReadEnvelope(r)
+	if err != nil {
+		return nil, err
+	}
+	_ = r.Close()
+	header := makeMetadata(sm)
+	return &Message{Metadata: *header, env: env}, nil
+}
+
+// MarkSeen marks the message as having been read.
+func (s *StoreManager) MarkSeen(mailbox, id string) error {
+	log.Debug().Str("module", "manager").Str("mailbox", mailbox).Str("id", id).
+		Msg("Marking as seen")
+	return s.Store.MarkSeen(mailbox, id)
+}
+
+// PurgeMessages removes all messages from the specified mailbox.
+func (s *StoreManager) PurgeMessages(mailbox string) error {
+	return s.Store.PurgeMessages(mailbox)
+}
+
+// RemoveMessage deletes the specified message.
+func (s *StoreManager) RemoveMessage(mailbox, id string) error {
+	return s.Store.RemoveMessage(mailbox, id)
+}
+
+// SourceReader allows the stored message source to be read.
+func (s *StoreManager) SourceReader(mailbox, id string) (io.ReadCloser, error) {
+	sm, err := s.Store.GetMessage(mailbox, id)
+	if err != nil || sm == nil {
+		return nil, err
+	}
+	return sm.Source()
+}
+
+// MailboxForAddress parses an email address to return the canonical mailbox name.
+func (s *StoreManager) MailboxForAddress(mailbox string) (string, error) {
+	return s.AddrPolicy.ExtractMailbox(mailbox)
+}
+
+// makeMetadata populates Metadata from a storage.Message.
+func makeMetadata(m storage.Message) *Metadata {
+	return &Metadata{
+		Mailbox: m.Mailbox(),
+		ID:      m.ID(),
+		From:    m.From(),
+		To:      m.To(),
+		Date:    m.Date(),
+		Subject: m.Subject(),
+		Size:    m.Size(),
+		Seen:    m.Seen(),
+	}
+}

pkg/message/message.go

@@ -0,0 +1,117 @@
+// Package message contains message handling logic.
+package message
+
+import (
+	"io"
+	"io/ioutil"
+	"net/mail"
+	"net/textproto"
+	"time"
+
+	"github.com/jhillyerd/enmime"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+)
+
+// Metadata holds information about a message, but not the content.
+type Metadata struct {
+	Mailbox string
+	ID      string
+	From    *mail.Address
+	To      []*mail.Address
+	Date    time.Time
+	Subject string
+	Size    int64
+	Seen    bool
+}
+
+// Message holds both the metadata and content of a message.
+type Message struct {
+	Metadata
+	env *enmime.Envelope
+}
+
+// New constructs a new Message
+func New(m Metadata, e *enmime.Envelope) *Message {
+	return &Message{
+		Metadata: m,
+		env:      e,
+	}
+}
+
+// Attachments returns the MIME attachments for the message.
+func (m *Message) Attachments() []*enmime.Part {
+	return m.env.Attachments
+}
+
+// Header returns the header map for this message.
+func (m *Message) Header() textproto.MIMEHeader {
+	return m.env.Root.Header
+}
+
+// HTML returns the HTML body of the message.
+func (m *Message) HTML() string {
+	return m.env.HTML
+}
+
+// MIMEErrors returns MIME parsing errors and warnings.
+func (m *Message) MIMEErrors() []*enmime.Error {
+	return m.env.Errors
+}
+
+// Text returns the plain text body of the message.
+func (m *Message) Text() string {
+	return m.env.Text
+}
+
+// Delivery is used to add a message to storage.
+type Delivery struct {
+	Meta   Metadata
+	Reader io.Reader
+}
+
+var _ storage.Message = &Delivery{}
+
+// Mailbox getter.
+func (d *Delivery) Mailbox() string {
+	return d.Meta.Mailbox
+}
+
+// ID getter.
+func (d *Delivery) ID() string {
+	return d.Meta.ID
+}
+
+// From getter.
+func (d *Delivery) From() *mail.Address {
+	return d.Meta.From
+}
+
+// To getter.
+func (d *Delivery) To() []*mail.Address {
+	return d.Meta.To
+}
+
+// Date getter.
+func (d *Delivery) Date() time.Time {
+	return d.Meta.Date
+}
+
+// Subject getter.
+func (d *Delivery) Subject() string {
+	return d.Meta.Subject
+}
+
+// Size getter.
+func (d *Delivery) Size() int64 {
+	return d.Meta.Size
+}
+
+// Source contains the raw content of the message.
+func (d *Delivery) Source() (io.ReadCloser, error) {
+	return ioutil.NopCloser(d.Reader), nil
+}
+
+// Seen getter.
+func (d *Delivery) Seen() bool {
+	return d.Meta.Seen
+}

pkg/metric/metric.go

@@ -0,0 +1,63 @@
+package metric
+
+import (
+	"container/list"
+	"expvar"
+	"strings"
+	"time"
+)
+
+// TickerFunc is the function signature accepted by AddTickerFunc, will be called once per minute.
+type TickerFunc func()
+
+var tickerFuncChan = make(chan TickerFunc)
+
+func init() {
+	go metricsTicker()
+}
+
+// AddTickerFunc adds a new function callback to the list of metrics TickerFuncs that get
+// called each minute.
+func AddTickerFunc(f TickerFunc) {
+	tickerFuncChan <- f
+}
+
+// Push adds the metric to the end of the list and returns a comma separated string of the
+// previous 61 entries.  We return 61 instead of 60 (an hour) because the chart on the client
+// tracks deltas between these values - there is nothing to compare the first value against.
+func Push(history *list.List, ev expvar.Var) string {
+	history.PushBack(ev.String())
+	if history.Len() > 61 {
+		history.Remove(history.Front())
+	}
+	return joinStringList(history)
+}
+
+// metricsTicker calls the current list of TickerFuncs once per minute.
+func metricsTicker() {
+	funcs := make([]TickerFunc, 0)
+	ticker := time.NewTicker(time.Minute)
+
+	for {
+		select {
+		case <-ticker.C:
+			for _, f := range funcs {
+				f()
+			}
+		case f := <-tickerFuncChan:
+			funcs = append(funcs, f)
+		}
+	}
+}
+
+// joinStringList joins a List containing strings by commas.
+func joinStringList(listOfStrings *list.List) string {
+	if listOfStrings.Len() == 0 {
+		return ""
+	}
+	s := make([]string, 0, listOfStrings.Len())
+	for e := listOfStrings.Front(); e != nil; e = e.Next() {
+		s = append(s, e.Value.(string))
+	}
+	return strings.Join(s, ",")
+}

pkg/msghub/hub.go

@@ -63,13 +63,15 @@ func New(ctx context.Context, historyLen int) *Hub {
 // history buffer and then relayed to all registered listeners.
 func (hub *Hub) Dispatch(msg Message) {
 	hub.opChan <- func(h *Hub) {
-		// Add to history buffer
-		h.history.Value = msg
-		h.history = h.history.Next()
-		// Deliver message to all listeners, removing listeners if they return an error
-		for l := range h.listeners {
-			if err := l.Receive(msg); err != nil {
-				delete(h.listeners, l)
+		if h.history != nil {
+			// Add to history buffer
+			h.history.Value = msg
+			h.history = h.history.Next()
+			// Deliver message to all listeners, removing listeners if they return an error
+			for l := range h.listeners {
+				if err := l.Receive(msg); err != nil {
+					delete(h.listeners, l)
+				}
 			}
 		}
 	}

pkg/msghub/hub_test.go

@@ -60,6 +60,17 @@ func TestHubNew(t *testing.T) {
 	}
 }
 
+func TestHubZeroLen(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	hub := New(ctx, 0)
+	m := Message{}
+	for i := 0; i < 100; i++ {
+		hub.Dispatch(m)
+	}
+	// Just making sure Hub doesn't panic
+}
+
 func TestHubZeroListeners(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()

pkg/policy/address.go

@@ -1,71 +1,112 @@
-package smtpd
+package policy
 
 import (
 	"bytes"
-	"container/list"
-	"crypto/sha1"
 	"fmt"
-	"io"
+	"net/mail"
 	"strings"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/stringutil"
 )
 
-// ParseMailboxName takes a localPart string (ex: "user+ext" without "@domain")
-// and returns just the mailbox name (ex: "user").  Returns an error if
-// localPart contains invalid characters; it won't accept any that must be
-// quoted according to RFC3696.
-func ParseMailboxName(localPart string) (result string, err error) {
-	if localPart == "" {
-		return "", fmt.Errorf("Mailbox name cannot be empty")
-	}
-	result = strings.ToLower(localPart)
-
-	invalid := make([]byte, 0, 10)
-
-	for i := 0; i < len(result); i++ {
-		c := result[i]
-		switch {
-		case 'a' <= c && c <= 'z':
-		case '0' <= c && c <= '9':
-		case bytes.IndexByte([]byte("!#$%&'*+-=/?^_`.{|}~"), c) >= 0:
-		default:
-			invalid = append(invalid, c)
-		}
-	}
-
-	if len(invalid) > 0 {
-		return "", fmt.Errorf("Mailbox name contained invalid character(s): %q", invalid)
-	}
-
-	if idx := strings.Index(result, "+"); idx > -1 {
-		result = result[0:idx]
-	}
-	return result, nil
+// Addressing handles email address policy.
+type Addressing struct {
+	Config *config.Root
 }
 
-// HashMailboxName accepts a mailbox name and hashes it.  Inbucket uses this as
-// the directory to house the mailbox
-func HashMailboxName(mailbox string) string {
-	h := sha1.New()
-	if _, err := io.WriteString(h, mailbox); err != nil {
-		// This shouldn't ever happen
-		return ""
+// ExtractMailbox extracts the mailbox name from a partial email address.
+func (a *Addressing) ExtractMailbox(address string) (string, error) {
+	local, domain, err := parseEmailAddress(address)
+	if err != nil {
+		return "", err
 	}
-	return fmt.Sprintf("%x", h.Sum(nil))
+	local, err = parseMailboxName(local)
+	if err != nil {
+		return "", err
+	}
+	if a.Config.MailboxNaming == config.LocalNaming {
+		return local, nil
+	}
+	if a.Config.MailboxNaming != config.FullNaming {
+		return "", fmt.Errorf("Unknown MailboxNaming value: %v", a.Config.MailboxNaming)
+	}
+	if domain == "" {
+		return local, nil
+	}
+	if !ValidateDomainPart(domain) {
+		return "", fmt.Errorf("Domain part %q in %q failed validation", domain, address)
+	}
+	return local + "@" + domain, nil
 }
 
-// JoinStringList joins a List containing strings by commas
-func JoinStringList(listOfStrings *list.List) string {
-	if listOfStrings.Len() == 0 {
-		return ""
+// NewRecipient parses an address into a Recipient.
+func (a *Addressing) NewRecipient(address string) (*Recipient, error) {
+	local, domain, err := ParseEmailAddress(address)
+	if err != nil {
+		return nil, err
 	}
-	s := make([]string, 0, listOfStrings.Len())
-	for e := listOfStrings.Front(); e != nil; e = e.Next() {
-		s = append(s, e.Value.(string))
+	mailbox, err := a.ExtractMailbox(address)
+	if err != nil {
+		return nil, err
 	}
-	return strings.Join(s, ",")
+	ar, err := mail.ParseAddress(address)
+	if err != nil {
+		return nil, err
+	}
+	return &Recipient{
+		Address:    *ar,
+		addrPolicy: a,
+		LocalPart:  local,
+		Domain:     domain,
+		Mailbox:    mailbox,
+	}, nil
 }
 
-// ValidateDomainPart returns true if the domain part complies to RFC3696, RFC1035
+// ShouldAcceptDomain indicates if Inbucket accepts mail destined for the specified domain.
+func (a *Addressing) ShouldAcceptDomain(domain string) bool {
+	domain = strings.ToLower(domain)
+	if a.Config.SMTP.DefaultAccept &&
+		!stringutil.SliceContains(a.Config.SMTP.RejectDomains, domain) {
+		return true
+	}
+	if !a.Config.SMTP.DefaultAccept &&
+		stringutil.SliceContains(a.Config.SMTP.AcceptDomains, domain) {
+		return true
+	}
+	return false
+}
+
+// ShouldStoreDomain indicates if Inbucket stores mail destined for the specified domain.
+func (a *Addressing) ShouldStoreDomain(domain string) bool {
+	domain = strings.ToLower(domain)
+	if a.Config.SMTP.DefaultStore &&
+		!stringutil.SliceContains(a.Config.SMTP.DiscardDomains, domain) {
+		return true
+	}
+	if !a.Config.SMTP.DefaultStore &&
+		stringutil.SliceContains(a.Config.SMTP.StoreDomains, domain) {
+		return true
+	}
+	return false
+}
+
+// ParseEmailAddress unescapes an email address, and splits the local part from the domain part.
+// An error is returned if the local or domain parts fail validation following the guidelines
+// in RFC3696.
+func ParseEmailAddress(address string) (local string, domain string, err error) {
+	local, domain, err = parseEmailAddress(address)
+	if err != nil {
+		return "", "", err
+	}
+	if !ValidateDomainPart(domain) {
+		return "", "", fmt.Errorf("Domain part validation failed")
+	}
+	return local, domain, nil
+}
+
+// ValidateDomainPart returns true if the domain part complies to RFC3696, RFC1035. Used by
+// ParseEmailAddress().
 func ValidateDomainPart(domain string) bool {
 	if len(domain) == 0 {
 		return false
@@ -79,22 +120,21 @@ func ValidateDomainPart(domain string) bool {
 	prev := '.'
 	labelLen := 0
 	hasAlphaNum := false
-
 	for _, c := range domain {
 		switch {
 		case ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') ||
 			('0' <= c && c <= '9') || c == '_':
-			// Must contain some of these to be a valid label
+			// Must contain some of these to be a valid label.
 			hasAlphaNum = true
 			labelLen++
 		case c == '-':
 			if prev == '.' {
-				// Cannot lead with hyphen
+				// Cannot lead with hyphen.
 				return false
 			}
 		case c == '.':
 			if prev == '.' || prev == '-' {
-				// Cannot end with hyphen or double-dot
+				// Cannot end with hyphen or double-dot.
 				return false
 			}
 			if labelLen > 63 {
@@ -106,19 +146,18 @@ func ValidateDomainPart(domain string) bool {
 			labelLen = 0
 			hasAlphaNum = false
 		default:
-			// Unknown character
+			// Unknown character.
 			return false
 		}
 		prev = c
 	}
-
 	return true
 }
 
-// ParseEmailAddress unescapes an email address, and splits the local part from the domain part.
-// An error is returned if the local or domain parts fail validation following the guidelines
-// in RFC3696.
-func ParseEmailAddress(address string) (local string, domain string, err error) {
+// parseEmailAddress unescapes an email address, and splits the local part from the domain part.  An
+// error is returned if the local part fails validation following the guidelines in RFC3696. The
+// domain part is optional and not validated.
+func parseEmailAddress(address string) (local string, domain string, err error) {
 	if address == "" {
 		return "", "", fmt.Errorf("Empty address")
 	}
@@ -131,8 +170,7 @@ func ParseEmailAddress(address string) (local string, domain string, err error)
 	if address[0] == '.' {
 		return "", "", fmt.Errorf("Address cannot start with a period")
 	}
-
-	// Loop over address parsing out local part
+	// Loop over address parsing out local part.
 	buf := new(bytes.Buffer)
 	prev := byte('.')
 	inCharQuote := false
@@ -142,30 +180,45 @@ LOOP:
 		c := address[i]
 		switch {
 		case ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'):
-			// Letters are OK
-			_ = buf.WriteByte(c)
+			// Letters are OK.
+			err = buf.WriteByte(c)
+			if err != nil {
+				return
+			}
 			inCharQuote = false
 		case '0' <= c && c <= '9':
-			// Numbers are OK
-			_ = buf.WriteByte(c)
+			// Numbers are OK.
+			err = buf.WriteByte(c)
+			if err != nil {
+				return
+			}
 			inCharQuote = false
 		case bytes.IndexByte([]byte("!#$%&'*+-/=?^_`{|}~"), c) >= 0:
-			// These specials can be used unquoted
-			_ = buf.WriteByte(c)
+			// These specials can be used unquoted.
+			err = buf.WriteByte(c)
+			if err != nil {
+				return
+			}
 			inCharQuote = false
 		case c == '.':
-			// A single period is OK
+			// A single period is OK.
 			if prev == '.' {
-				// Sequence of periods is not permitted
+				// Sequence of periods is not permitted.
 				return "", "", fmt.Errorf("Sequence of periods is not permitted")
 			}
-			_ = buf.WriteByte(c)
+			err = buf.WriteByte(c)
+			if err != nil {
+				return
+			}
 			inCharQuote = false
 		case c == '\\':
 			inCharQuote = true
 		case c == '"':
 			if inCharQuote {
-				_ = buf.WriteByte(c)
+				err = buf.WriteByte(c)
+				if err != nil {
+					return
+				}
 				inCharQuote = false
 			} else if inStringQuote {
 				inStringQuote = false
@@ -178,10 +231,13 @@ LOOP:
 			}
 		case c == '@':
 			if inCharQuote || inStringQuote {
-				_ = buf.WriteByte(c)
+				err = buf.WriteByte(c)
+				if err != nil {
+					return
+				}
 				inCharQuote = false
 			} else {
-				// End of local-part
+				// End of local-part.
 				if i > 128 {
 					return "", "", fmt.Errorf("Local part must not exceed 128 characters")
 				}
@@ -195,7 +251,10 @@ LOOP:
 			return "", "", fmt.Errorf("Characters outside of US-ASCII range not permitted")
 		default:
 			if inCharQuote || inStringQuote {
-				_ = buf.WriteByte(c)
+				err = buf.WriteByte(c)
+				if err != nil {
+					return
+				}
 				inCharQuote = false
 			} else {
 				return "", "", fmt.Errorf("Character %q must be quoted", c)
@@ -209,10 +268,34 @@ LOOP:
 	if inStringQuote {
 		return "", "", fmt.Errorf("Cannot end address with unterminated string quote")
 	}
-
-	if !ValidateDomainPart(domain) {
-		return "", "", fmt.Errorf("Domain part validation failed")
-	}
-
 	return buf.String(), domain, nil
 }
+
+// ParseMailboxName takes a localPart string (ex: "user+ext" without "@domain")
+// and returns just the mailbox name (ex: "user").  Returns an error if
+// localPart contains invalid characters; it won't accept any that must be
+// quoted according to RFC3696.
+func parseMailboxName(localPart string) (result string, err error) {
+	if localPart == "" {
+		return "", fmt.Errorf("Mailbox name cannot be empty")
+	}
+	result = strings.ToLower(localPart)
+	invalid := make([]byte, 0, 10)
+	for i := 0; i < len(result); i++ {
+		c := result[i]
+		switch {
+		case 'a' <= c && c <= 'z':
+		case '0' <= c && c <= '9':
+		case bytes.IndexByte([]byte("!#$%&'*+-=/?^_`.{|}~"), c) >= 0:
+		default:
+			invalid = append(invalid, c)
+		}
+	}
+	if len(invalid) > 0 {
+		return "", fmt.Errorf("Mailbox name contained invalid character(s): %q", invalid)
+	}
+	if idx := strings.Index(result, "+"); idx > -1 {
+		result = result[0:idx]
+	}
+	return result, nil
+}

pkg/policy/address_test.go

@@ -0,0 +1,374 @@
+package policy_test
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/policy"
+)
+
+func TestShouldAcceptDomain(t *testing.T) {
+	// Test with default accept.
+	ap := &policy.Addressing{
+		Config: &config.Root{
+			SMTP: config.SMTP{
+				DefaultAccept: true,
+				RejectDomains: []string{"a.deny.com", "deny.com"},
+			},
+		},
+	}
+	testCases := []struct {
+		domain string
+		want   bool
+	}{
+		{domain: "bar.com", want: true},
+		{domain: "DENY.com", want: false},
+		{domain: "a.deny.com", want: false},
+		{domain: "b.deny.com", want: true},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.domain, func(t *testing.T) {
+			got := ap.ShouldAcceptDomain(tc.domain)
+			if got != tc.want {
+				t.Errorf("Got %v for %q, want: %v", got, tc.domain, tc.want)
+			}
+
+		})
+	}
+	// Test with default reject.
+	ap = &policy.Addressing{
+		Config: &config.Root{
+			SMTP: config.SMTP{
+				DefaultAccept: false,
+				AcceptDomains: []string{"a.allow.com", "allow.com"},
+			},
+		},
+	}
+	testCases = []struct {
+		domain string
+		want   bool
+	}{
+		{domain: "bar.com", want: false},
+		{domain: "ALLOW.com", want: true},
+		{domain: "a.allow.com", want: true},
+		{domain: "b.allow.com", want: false},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.domain, func(t *testing.T) {
+			got := ap.ShouldAcceptDomain(tc.domain)
+			if got != tc.want {
+				t.Errorf("Got %v for %q, want: %v", got, tc.domain, tc.want)
+			}
+
+		})
+	}
+}
+
+func TestShouldStoreDomain(t *testing.T) {
+	// Test with storage enabled.
+	ap := &policy.Addressing{
+		Config: &config.Root{
+			SMTP: config.SMTP{
+				DefaultStore: false,
+				StoreDomains: []string{"store.com", "a.store.com"},
+			},
+		},
+	}
+	testCases := []struct {
+		domain string
+		want   bool
+	}{
+		{domain: "foo.com", want: false},
+		{domain: "STORE.com", want: true},
+		{domain: "a.store.com", want: true},
+		{domain: "b.store.com", want: false},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.domain, func(t *testing.T) {
+			got := ap.ShouldStoreDomain(tc.domain)
+			if got != tc.want {
+				t.Errorf("Got store %v for %q, want: %v", got, tc.domain, tc.want)
+			}
+
+		})
+	}
+	// Test with storage disabled.
+	ap = &policy.Addressing{
+		Config: &config.Root{
+			SMTP: config.SMTP{
+				DefaultStore:   true,
+				DiscardDomains: []string{"discard.com", "a.discard.com"},
+			},
+		},
+	}
+	testCases = []struct {
+		domain string
+		want   bool
+	}{
+		{domain: "foo.com", want: true},
+		{domain: "DISCARD.com", want: false},
+		{domain: "a.discard.com", want: false},
+		{domain: "b.discard.com", want: true},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.domain, func(t *testing.T) {
+			got := ap.ShouldStoreDomain(tc.domain)
+			if got != tc.want {
+				t.Errorf("Got store %v for %q, want: %v", got, tc.domain, tc.want)
+			}
+
+		})
+	}
+}
+
+func TestExtractMailboxValid(t *testing.T) {
+	localPolicy := policy.Addressing{Config: &config.Root{MailboxNaming: config.LocalNaming}}
+	fullPolicy := policy.Addressing{Config: &config.Root{MailboxNaming: config.FullNaming}}
+
+	testTable := []struct {
+		input string // Input to test
+		local string // Expected output when mailbox naming = local
+		full  string // Expected output when mailbox naming = full
+	}{
+		{
+			input: "mailbox",
+			local: "mailbox",
+			full:  "mailbox",
+		},
+		{
+			input: "user123",
+			local: "user123",
+			full:  "user123",
+		},
+		{
+			input: "MailBOX",
+			local: "mailbox",
+			full:  "mailbox",
+		},
+		{
+			input: "First.Last",
+			local: "first.last",
+			full:  "first.last",
+		},
+		{
+			input: "user+label",
+			local: "user",
+			full:  "user",
+		},
+		{
+			input: "chars!#$%",
+			local: "chars!#$%",
+			full:  "chars!#$%",
+		},
+		{
+			input: "chars&'*-",
+			local: "chars&'*-",
+			full:  "chars&'*-",
+		},
+		{
+			input: "chars=/?^",
+			local: "chars=/?^",
+			full:  "chars=/?^",
+		},
+		{
+			input: "chars_`.{",
+			local: "chars_`.{",
+			full:  "chars_`.{",
+		},
+		{
+			input: "chars|}~",
+			local: "chars|}~",
+			full:  "chars|}~",
+		},
+		{
+			input: "mailbox@domain.com",
+			local: "mailbox",
+			full:  "mailbox@domain.com",
+		},
+		{
+			input: "user123@domain.com",
+			local: "user123",
+			full:  "user123@domain.com",
+		},
+		{
+			input: "MailBOX@domain.com",
+			local: "mailbox",
+			full:  "mailbox@domain.com",
+		},
+		{
+			input: "First.Last@domain.com",
+			local: "first.last",
+			full:  "first.last@domain.com",
+		},
+		{
+			input: "user+label@domain.com",
+			local: "user",
+			full:  "user@domain.com",
+		},
+		{
+			input: "chars!#$%@domain.com",
+			local: "chars!#$%",
+			full:  "chars!#$%@domain.com",
+		},
+		{
+			input: "chars&'*-@domain.com",
+			local: "chars&'*-",
+			full:  "chars&'*-@domain.com",
+		},
+		{
+			input: "chars=/?^@domain.com",
+			local: "chars=/?^",
+			full:  "chars=/?^@domain.com",
+		},
+		{
+			input: "chars_`.{@domain.com",
+			local: "chars_`.{",
+			full:  "chars_`.{@domain.com",
+		},
+		{
+			input: "chars|}~@domain.com",
+			local: "chars|}~",
+			full:  "chars|}~@domain.com",
+		},
+	}
+	for _, tc := range testTable {
+		if result, err := localPolicy.ExtractMailbox(tc.input); err != nil {
+			t.Errorf("Error while parsing with local naming %q: %v", tc.input, err)
+		} else {
+			if result != tc.local {
+				t.Errorf("Parsing %q, expected %q, got %q", tc.input, tc.local, result)
+			}
+		}
+		if result, err := fullPolicy.ExtractMailbox(tc.input); err != nil {
+			t.Errorf("Error while parsing with full naming %q: %v", tc.input, err)
+		} else {
+			if result != tc.full {
+				t.Errorf("Parsing %q, expected %q, got %q", tc.input, tc.full, result)
+			}
+		}
+	}
+}
+
+func TestExtractMailboxInvalid(t *testing.T) {
+	localPolicy := policy.Addressing{Config: &config.Root{MailboxNaming: config.LocalNaming}}
+	fullPolicy := policy.Addressing{Config: &config.Root{MailboxNaming: config.FullNaming}}
+	// Test local mailbox naming policy.
+	localInvalidTable := []struct {
+		input, msg string
+	}{
+		{"", "Empty mailbox name is not permitted"},
+		{"first last", "Space not permitted"},
+		{"first\"last", "Double quote not permitted"},
+		{"first\nlast", "Control chars not permitted"},
+	}
+	for _, tt := range localInvalidTable {
+		if _, err := localPolicy.ExtractMailbox(tt.input); err == nil {
+			t.Errorf("Didn't get an error while parsing in local mode %q: %v", tt.input, tt.msg)
+		}
+	}
+	// Test full mailbox naming policy.
+	fullInvalidTable := []struct {
+		input, msg string
+	}{
+		{"", "Empty mailbox name is not permitted"},
+		{"user@host@domain.com", "@ symbol not permitted"},
+		{"first last@domain.com", "Space not permitted"},
+		{"first\"last@domain.com", "Double quote not permitted"},
+		{"first\nlast@domain.com", "Control chars not permitted"},
+	}
+	for _, tt := range fullInvalidTable {
+		if _, err := fullPolicy.ExtractMailbox(tt.input); err == nil {
+			t.Errorf("Didn't get an error while parsing in full mode %q: %v", tt.input, tt.msg)
+		}
+	}
+}
+
+func TestValidateDomain(t *testing.T) {
+	testTable := []struct {
+		input  string
+		expect bool
+		msg    string
+	}{
+		{"", false, "Empty domain is not valid"},
+		{"hostname", true, "Just a hostname is valid"},
+		{"github.com", true, "Two labels should be just fine"},
+		{"my-domain.com", true, "Hyphen is allowed mid-label"},
+		{"_domainkey.foo.com", true, "Underscores are allowed"},
+		{"bar.com.", true, "Must be able to end with a dot"},
+		{"ABC.6DBS.com", true, "Mixed case is OK"},
+		{"mail.123.com", true, "Number only label valid"},
+		{"123.com", true, "Number only label valid"},
+		{"google..com", false, "Double dot not valid"},
+		{".foo.com", false, "Cannot start with a dot"},
+		{"google\r.com", false, "Special chars not allowed"},
+		{"foo.-bar.com", false, "Label cannot start with hyphen"},
+		{"foo-.bar.com", false, "Label cannot end with hyphen"},
+		{strings.Repeat("a", 256), false, "Max domain length is 255"},
+		{strings.Repeat("a", 63) + ".com", true, "Should allow 63 char domain label"},
+		{strings.Repeat("a", 64) + ".com", false, "Max domain label length is 63"},
+	}
+	for _, tt := range testTable {
+		if policy.ValidateDomainPart(tt.input) != tt.expect {
+			t.Errorf("Expected %v for %q: %s", tt.expect, tt.input, tt.msg)
+		}
+	}
+}
+
+func TestValidateLocal(t *testing.T) {
+	testTable := []struct {
+		input  string
+		expect bool
+		msg    string
+	}{
+		{"", false, "Empty local is not valid"},
+		{"a", true, "Single letter should be fine"},
+		{strings.Repeat("a", 128), true, "Valid up to 128 characters"},
+		{strings.Repeat("a", 129), false, "Only valid up to 128 characters"},
+		{"FirstLast", true, "Mixed case permitted"},
+		{"user123", true, "Numbers permitted"},
+		{"a!#$%&'*+-/=?^_`{|}~", true, "Any of !#$%&'*+-/=?^_`{|}~ are permitted"},
+		{"first.last", true, "Embedded period is permitted"},
+		{"first..last", false, "Sequence of periods is not allowed"},
+		{".user", false, "Cannot lead with a period"},
+		{"user.", false, "Cannot end with a period"},
+		// {"james@mail", false, "Unquoted @ not permitted"},
+		{"first last", false, "Unquoted space not permitted"},
+		{"tricky\\. ", false, "Unquoted space not permitted"},
+		{"no,commas", false, "Unquoted comma not allowed"},
+		{"t[es]t", false, "Unquoted square brackets not allowed"},
+		// {"james\\", false, "Cannot end with backslash quote"},
+		{"james\\@mail", true, "Quoted @ permitted"},
+		{"quoted\\ space", true, "Quoted space permitted"},
+		{"no\\,commas", true, "Quoted comma is OK"},
+		{"t\\[es\\]t", true, "Quoted brackets are OK"},
+		{"user\\name", true, "Should be able to quote a-z"},
+		{"USER\\NAME", true, "Should be able to quote A-Z"},
+		{"user\\1", true, "Should be able to quote a digit"},
+		{"one\\$\\|", true, "Should be able to quote plain specials"},
+		{"return\\\r", true, "Should be able to quote ASCII control chars"},
+		{"high\\\x80", false, "Should not accept > 7-bit quoted chars"},
+		{"quote\\\"", true, "Quoted double quote is permitted"},
+		{"\"james\"", true, "Quoted a-z is permitted"},
+		{"\"first last\"", true, "Quoted space is permitted"},
+		{"\"quoted@sign\"", true, "Quoted @ is allowed"},
+		{"\"qp\\\"quote\"", true, "Quoted quote within quoted string is OK"},
+		{"\"unterminated", false, "Quoted string must be terminated"},
+		{"\"unterminated\\\"", false, "Quoted string must be terminated"},
+		{"embed\"quote\"string", false, "Embedded quoted string is illegal"},
+		{"user+mailbox", true, "RFC3696 test case should be valid"},
+		{"customer/department=shipping", true, "RFC3696 test case should be valid"},
+		{"$A12345", true, "RFC3696 test case should be valid"},
+		{"!def!xyz%abc", true, "RFC3696 test case should be valid"},
+		{"_somename", true, "RFC3696 test case should be valid"},
+	}
+	for _, tt := range testTable {
+		_, _, err := policy.ParseEmailAddress(tt.input + "@domain.com")
+		if (err != nil) == tt.expect {
+			if err != nil {
+				t.Logf("Got error: %s", err)
+			}
+			t.Errorf("Expected %v for %q: %s", tt.expect, tt.input, tt.msg)
+		}
+	}
+}

pkg/policy/recipient.go

@@ -0,0 +1,25 @@
+package policy
+
+import "net/mail"
+
+// Recipient represents a potential email recipient, allows policies for it to be queried.
+type Recipient struct {
+	mail.Address
+	addrPolicy *Addressing
+	// LocalPart is the part of the address before @, including +extension.
+	LocalPart string
+	// Domain is the part of the address after @.
+	Domain string
+	// Mailbox is the canonical mailbox name for this recipient.
+	Mailbox string
+}
+
+// ShouldAccept returns true if Inbucket should accept mail for this recipient.
+func (r *Recipient) ShouldAccept() bool {
+	return r.addrPolicy.ShouldAcceptDomain(r.Domain)
+}
+
+// ShouldStore returns true if Inbucket should store mail for this recipient.
+func (r *Recipient) ShouldStore() bool {
+	return r.addrPolicy.ShouldStoreDomain(r.Domain)
+}

pkg/rest/apiv1_controller.go

@@ -0,0 +1,179 @@
+package rest
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+
+	"crypto/md5"
+	"encoding/hex"
+	"encoding/json"
+	"strconv"
+
+	"github.com/jhillyerd/inbucket/pkg/rest/model"
+	"github.com/jhillyerd/inbucket/pkg/server/web"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/stringutil"
+)
+
+// MailboxListV1 renders a list of messages in a mailbox
+func MailboxListV1(w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	// Don't have to validate these aren't empty, Gorilla returns 404
+	name, err := ctx.Manager.MailboxForAddress(ctx.Vars["name"])
+	if err != nil {
+		return err
+	}
+	messages, err := ctx.Manager.GetMetadata(name)
+	if err != nil {
+		// This doesn't indicate empty, likely an IO error
+		return fmt.Errorf("Failed to get messages for %v: %v", name, err)
+	}
+	jmessages := make([]*model.JSONMessageHeaderV1, len(messages))
+	for i, msg := range messages {
+		jmessages[i] = &model.JSONMessageHeaderV1{
+			Mailbox: name,
+			ID:      msg.ID,
+			From:    msg.From.String(),
+			To:      stringutil.StringAddressList(msg.To),
+			Subject: msg.Subject,
+			Date:    msg.Date,
+			Size:    msg.Size,
+			Seen:    msg.Seen,
+		}
+	}
+	return web.RenderJSON(w, jmessages)
+}
+
+// MailboxShowV1 renders a particular message from a mailbox
+func MailboxShowV1(w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	// Don't have to validate these aren't empty, Gorilla returns 404
+	id := ctx.Vars["id"]
+	name, err := ctx.Manager.MailboxForAddress(ctx.Vars["name"])
+	if err != nil {
+		return err
+	}
+	msg, err := ctx.Manager.GetMessage(name, id)
+	if err != nil && err != storage.ErrNotExist {
+		return fmt.Errorf("GetMessage(%q) failed: %v", id, err)
+	}
+	if msg == nil {
+		http.NotFound(w, req)
+		return nil
+	}
+	attachParts := msg.Attachments()
+	attachments := make([]*model.JSONMessageAttachmentV1, len(attachParts))
+	for i, part := range attachParts {
+		content := part.Content
+		var checksum = md5.Sum(content)
+		attachments[i] = &model.JSONMessageAttachmentV1{
+			ContentType: part.ContentType,
+			FileName:    part.FileName,
+			DownloadLink: "http://" + req.Host + "/mailbox/dattach/" + name + "/" + id + "/" +
+				strconv.Itoa(i) + "/" + part.FileName,
+			ViewLink: "http://" + req.Host + "/mailbox/vattach/" + name + "/" + id + "/" +
+				strconv.Itoa(i) + "/" + part.FileName,
+			MD5: hex.EncodeToString(checksum[:]),
+		}
+	}
+	return web.RenderJSON(w,
+		&model.JSONMessageV1{
+			Mailbox: name,
+			ID:      msg.ID,
+			From:    msg.From.String(),
+			To:      stringutil.StringAddressList(msg.To),
+			Subject: msg.Subject,
+			Date:    msg.Date,
+			Size:    msg.Size,
+			Seen:    msg.Seen,
+			Header:  msg.Header(),
+			Body: &model.JSONMessageBodyV1{
+				Text: msg.Text(),
+				HTML: msg.HTML(),
+			},
+			Attachments: attachments,
+		})
+}
+
+// MailboxMarkSeenV1 marks a message as read.
+func MailboxMarkSeenV1(w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	// Don't have to validate these aren't empty, Gorilla returns 404
+	id := ctx.Vars["id"]
+	name, err := ctx.Manager.MailboxForAddress(ctx.Vars["name"])
+	if err != nil {
+		return err
+	}
+	dec := json.NewDecoder(req.Body)
+	dm := model.JSONMessageHeaderV1{}
+	if err := dec.Decode(&dm); err != nil {
+		return fmt.Errorf("Failed to decode JSON: %v", err)
+	}
+	if dm.Seen {
+		err = ctx.Manager.MarkSeen(name, id)
+		if err == storage.ErrNotExist {
+			http.NotFound(w, req)
+			return nil
+		}
+		if err != nil {
+			// This doesn't indicate empty, likely an IO error
+			return fmt.Errorf("MarkSeen(%q) failed: %v", id, err)
+		}
+	}
+	return web.RenderJSON(w, "OK")
+}
+
+// MailboxPurgeV1 deletes all messages from a mailbox
+func MailboxPurgeV1(w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	// Don't have to validate these aren't empty, Gorilla returns 404
+	name, err := ctx.Manager.MailboxForAddress(ctx.Vars["name"])
+	if err != nil {
+		return err
+	}
+	// Delete all messages
+	err = ctx.Manager.PurgeMessages(name)
+	if err != nil {
+		return fmt.Errorf("Mailbox(%q) purge failed: %v", name, err)
+	}
+	return web.RenderJSON(w, "OK")
+}
+
+// MailboxSourceV1 displays the raw source of a message, including headers. Renders text/plain
+func MailboxSourceV1(w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	// Don't have to validate these aren't empty, Gorilla returns 404
+	id := ctx.Vars["id"]
+	name, err := ctx.Manager.MailboxForAddress(ctx.Vars["name"])
+	if err != nil {
+		return err
+	}
+	r, err := ctx.Manager.SourceReader(name, id)
+	if err != nil && err != storage.ErrNotExist {
+		return fmt.Errorf("SourceReader(%q) failed: %v", id, err)
+	}
+	if r == nil {
+		http.NotFound(w, req)
+		return nil
+	}
+	// Output message source
+	w.Header().Set("Content-Type", "text/plain")
+	_, err = io.Copy(w, r)
+	return err
+}
+
+// MailboxDeleteV1 removes a particular message from a mailbox
+func MailboxDeleteV1(w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	// Don't have to validate these aren't empty, Gorilla returns 404
+	id := ctx.Vars["id"]
+	name, err := ctx.Manager.MailboxForAddress(ctx.Vars["name"])
+	if err != nil {
+		return err
+	}
+	err = ctx.Manager.RemoveMessage(name, id)
+	if err == storage.ErrNotExist {
+		http.NotFound(w, req)
+		return nil
+	}
+	if err != nil {
+		// This doesn't indicate missing, likely an IO error
+		return fmt.Errorf("RemoveMessage(%q) failed: %v", id, err)
+	}
+	return web.RenderJSON(w, "OK")
+}

pkg/rest/apiv1_controller_test.go

@@ -0,0 +1,304 @@
+package rest
+
+import (
+	"encoding/json"
+	"io"
+	"net/mail"
+	"net/textproto"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/jhillyerd/enmime"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/test"
+)
+
+const (
+	baseURL = "http://localhost/api/v1"
+
+	// JSON map keys
+	mailboxKey = "mailbox"
+	idKey      = "id"
+	fromKey    = "from"
+	toKey      = "to"
+	subjectKey = "subject"
+	dateKey    = "date"
+	sizeKey    = "size"
+	headerKey  = "header"
+	bodyKey    = "body"
+	textKey    = "text"
+	htmlKey    = "html"
+)
+
+func TestRestMailboxList(t *testing.T) {
+	// Setup
+	mm := test.NewManager()
+	logbuf := setupWebServer(mm)
+
+	// Test invalid mailbox name
+	w, err := testRestGet(baseURL + "/mailbox/foo%20bar")
+	expectCode := 500
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Errorf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	// Test empty mailbox
+	w, err = testRestGet(baseURL + "/mailbox/empty")
+	expectCode = 200
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Errorf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	// Test Mailbox error
+	w, err = testRestGet(baseURL + "/mailbox/messageserr")
+	expectCode = 500
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Errorf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	// Test JSON message headers
+	tzPDT := time.FixedZone("PDT", -7*3600)
+	tzPST := time.FixedZone("PST", -8*3600)
+	meta1 := message.Metadata{
+		Mailbox: "good",
+		ID:      "0001",
+		From:    &mail.Address{Name: "", Address: "from1@host"},
+		To:      []*mail.Address{{Name: "", Address: "to1@host"}},
+		Subject: "subject 1",
+		Date:    time.Date(2012, 2, 1, 10, 11, 12, 253, tzPST),
+	}
+	meta2 := message.Metadata{
+		Mailbox: "good",
+		ID:      "0002",
+		From:    &mail.Address{Name: "", Address: "from2@host"},
+		To:      []*mail.Address{{Name: "", Address: "to1@host"}},
+		Subject: "subject 2",
+		Date:    time.Date(2012, 7, 1, 10, 11, 12, 253, tzPDT),
+	}
+	mm.AddMessage("good", &message.Message{Metadata: meta1})
+	mm.AddMessage("good", &message.Message{Metadata: meta2})
+
+	// Check return code
+	w, err = testRestGet(baseURL + "/mailbox/good")
+	expectCode = 200
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Fatalf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	// Check JSON
+	dec := json.NewDecoder(w.Body)
+	var result []interface{}
+	if err := dec.Decode(&result); err != nil {
+		t.Errorf("Failed to decode JSON: %v", err)
+	}
+	if len(result) != 2 {
+		t.Fatalf("Expected 2 results, got %v", len(result))
+	}
+
+	decodedStringEquals(t, result, "[0]/mailbox", "good")
+	decodedStringEquals(t, result, "[0]/id", "0001")
+	decodedStringEquals(t, result, "[0]/from", "<from1@host>")
+	decodedStringEquals(t, result, "[0]/to/[0]", "<to1@host>")
+	decodedStringEquals(t, result, "[0]/subject", "subject 1")
+	decodedStringEquals(t, result, "[0]/date", "2012-02-01T10:11:12.000000253-08:00")
+	decodedNumberEquals(t, result, "[0]/size", 0)
+	decodedBoolEquals(t, result, "[0]/seen", false)
+	decodedStringEquals(t, result, "[1]/mailbox", "good")
+	decodedStringEquals(t, result, "[1]/id", "0002")
+	decodedStringEquals(t, result, "[1]/from", "<from2@host>")
+	decodedStringEquals(t, result, "[1]/to/[0]", "<to1@host>")
+	decodedStringEquals(t, result, "[1]/subject", "subject 2")
+	decodedStringEquals(t, result, "[1]/date", "2012-07-01T10:11:12.000000253-07:00")
+	decodedNumberEquals(t, result, "[1]/size", 0)
+	decodedBoolEquals(t, result, "[1]/seen", false)
+
+	if t.Failed() {
+		// Wait for handler to finish logging
+		time.Sleep(2 * time.Second)
+		// Dump buffered log data if there was a failure
+		_, _ = io.Copy(os.Stderr, logbuf)
+	}
+}
+
+func TestRestMessage(t *testing.T) {
+	// Setup
+	mm := test.NewManager()
+	logbuf := setupWebServer(mm)
+
+	// Test invalid mailbox name
+	w, err := testRestGet(baseURL + "/mailbox/foo%20bar/0001")
+	expectCode := 500
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Errorf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	// Test requesting a message that does not exist
+	w, err = testRestGet(baseURL + "/mailbox/empty/0001")
+	expectCode = 404
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Errorf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	// Test GetMessage error
+	w, err = testRestGet(baseURL + "/mailbox/messageerr/0001")
+	expectCode = 500
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Errorf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	if t.Failed() {
+		// Wait for handler to finish logging
+		time.Sleep(2 * time.Second)
+		// Dump buffered log data if there was a failure
+		_, _ = io.Copy(os.Stderr, logbuf)
+	}
+
+	// Test JSON message headers
+	tzPST := time.FixedZone("PST", -8*3600)
+	msg1 := message.New(
+		message.Metadata{
+			Mailbox: "good",
+			ID:      "0001",
+			From:    &mail.Address{Name: "", Address: "from1@host"},
+			To:      []*mail.Address{{Name: "", Address: "to1@host"}},
+			Subject: "subject 1",
+			Date:    time.Date(2012, 2, 1, 10, 11, 12, 253, tzPST),
+			Seen:    true,
+		},
+		&enmime.Envelope{
+			Text: "This is some text",
+			HTML: "This is some HTML",
+			Root: &enmime.Part{
+				Header: textproto.MIMEHeader{
+					"To":   []string{"fred@fish.com", "keyword@nsa.gov"},
+					"From": []string{"noreply@inbucket.org"},
+				},
+			},
+		},
+	)
+	mm.AddMessage("good", msg1)
+
+	// Check return code
+	w, err = testRestGet(baseURL + "/mailbox/good/0001")
+	expectCode = 200
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Fatalf("Expected code %v, got %v", expectCode, w.Code)
+	}
+
+	// Check JSON
+	dec := json.NewDecoder(w.Body)
+	var result map[string]interface{}
+	if err := dec.Decode(&result); err != nil {
+		t.Errorf("Failed to decode JSON: %v", err)
+	}
+
+	decodedStringEquals(t, result, "mailbox", "good")
+	decodedStringEquals(t, result, "id", "0001")
+	decodedStringEquals(t, result, "from", "<from1@host>")
+	decodedStringEquals(t, result, "to/[0]", "<to1@host>")
+	decodedStringEquals(t, result, "subject", "subject 1")
+	decodedStringEquals(t, result, "date", "2012-02-01T10:11:12.000000253-08:00")
+	decodedNumberEquals(t, result, "size", 0)
+	decodedBoolEquals(t, result, "seen", true)
+	decodedStringEquals(t, result, "body/text", "This is some text")
+	decodedStringEquals(t, result, "body/html", "This is some HTML")
+	decodedStringEquals(t, result, "header/To/[0]", "fred@fish.com")
+	decodedStringEquals(t, result, "header/To/[1]", "keyword@nsa.gov")
+	decodedStringEquals(t, result, "header/From/[0]", "noreply@inbucket.org")
+
+	if t.Failed() {
+		// Wait for handler to finish logging
+		time.Sleep(2 * time.Second)
+		// Dump buffered log data if there was a failure
+		_, _ = io.Copy(os.Stderr, logbuf)
+	}
+}
+
+func TestRestMarkSeen(t *testing.T) {
+	mm := test.NewManager()
+	logbuf := setupWebServer(mm)
+	// Create some messages.
+	tzPDT := time.FixedZone("PDT", -7*3600)
+	tzPST := time.FixedZone("PST", -8*3600)
+	meta1 := message.Metadata{
+		Mailbox: "good",
+		ID:      "0001",
+		From:    &mail.Address{Name: "", Address: "from1@host"},
+		To:      []*mail.Address{{Name: "", Address: "to1@host"}},
+		Subject: "subject 1",
+		Date:    time.Date(2012, 2, 1, 10, 11, 12, 253, tzPST),
+	}
+	meta2 := message.Metadata{
+		Mailbox: "good",
+		ID:      "0002",
+		From:    &mail.Address{Name: "", Address: "from2@host"},
+		To:      []*mail.Address{{Name: "", Address: "to1@host"}},
+		Subject: "subject 2",
+		Date:    time.Date(2012, 7, 1, 10, 11, 12, 253, tzPDT),
+	}
+	mm.AddMessage("good", &message.Message{Metadata: meta1})
+	mm.AddMessage("good", &message.Message{Metadata: meta2})
+	// Mark one read.
+	w, err := testRestPatch(baseURL+"/mailbox/good/0002", `{"seen":true}`)
+	expectCode := 200
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Fatalf("Expected code %v, got %v", expectCode, w.Code)
+	}
+	// Get mailbox.
+	w, err = testRestGet(baseURL + "/mailbox/good")
+	expectCode = 200
+	if err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != expectCode {
+		t.Fatalf("Expected code %v, got %v", expectCode, w.Code)
+	}
+	// Check JSON.
+	dec := json.NewDecoder(w.Body)
+	var result []interface{}
+	if err := dec.Decode(&result); err != nil {
+		t.Errorf("Failed to decode JSON: %v", err)
+	}
+	if len(result) != 2 {
+		t.Fatalf("Expected 2 results, got %v", len(result))
+	}
+	decodedStringEquals(t, result, "[0]/id", "0001")
+	decodedBoolEquals(t, result, "[0]/seen", false)
+	decodedStringEquals(t, result, "[1]/id", "0002")
+	decodedBoolEquals(t, result, "[1]/seen", true)
+
+	if t.Failed() {
+		// Wait for handler to finish logging
+		time.Sleep(2 * time.Second)
+		// Dump buffered log data if there was a failure
+		_, _ = io.Copy(os.Stderr, logbuf)
+	}
+}

pkg/rest/client/apiv1_client.go

@@ -0,0 +1,154 @@
+// Package client provides a basic REST client for Inbucket
+package client
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/rest/model"
+)
+
+// Client accesses the Inbucket REST API v1
+type Client struct {
+	restClient
+}
+
+// New creates a new v1 REST API client given the base URL of an Inbucket server, ex:
+// "http://localhost:9000"
+func New(baseURL string) (*Client, error) {
+	parsedURL, err := url.Parse(baseURL)
+	if err != nil {
+		return nil, err
+	}
+	c := &Client{
+		restClient{
+			client: &http.Client{
+				Timeout: 30 * time.Second,
+			},
+			baseURL: parsedURL,
+		},
+	}
+	return c, nil
+}
+
+// ListMailbox returns a list of messages for the requested mailbox
+func (c *Client) ListMailbox(name string) (headers []*MessageHeader, err error) {
+	uri := "/api/v1/mailbox/" + url.QueryEscape(name)
+	err = c.doJSON("GET", uri, &headers)
+	if err != nil {
+		return nil, err
+	}
+	for _, h := range headers {
+		h.client = c
+	}
+	return
+}
+
+// GetMessage returns the message details given a mailbox name and message ID.
+func (c *Client) GetMessage(name, id string) (message *Message, err error) {
+	uri := "/api/v1/mailbox/" + url.QueryEscape(name) + "/" + id
+	err = c.doJSON("GET", uri, &message)
+	if err != nil {
+		return nil, err
+	}
+	message.client = c
+	return
+}
+
+// MarkSeen marks the specified message as having been read.
+func (c *Client) MarkSeen(name, id string) error {
+	uri := "/api/v1/mailbox/" + url.QueryEscape(name) + "/" + id
+	err := c.doJSON("PATCH", uri, nil)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// GetMessageSource returns the message source given a mailbox name and message ID.
+func (c *Client) GetMessageSource(name, id string) (*bytes.Buffer, error) {
+	uri := "/api/v1/mailbox/" + url.QueryEscape(name) + "/" + id + "/source"
+	resp, err := c.do("GET", uri, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() {
+		_ = resp.Body.Close()
+	}()
+	if resp.StatusCode != http.StatusOK {
+		return nil,
+			fmt.Errorf("Unexpected HTTP response status %v: %s", resp.StatusCode, resp.Status)
+	}
+	buf := new(bytes.Buffer)
+	_, err = buf.ReadFrom(resp.Body)
+	return buf, err
+}
+
+// DeleteMessage deletes a single message given the mailbox name and message ID.
+func (c *Client) DeleteMessage(name, id string) error {
+	uri := "/api/v1/mailbox/" + url.QueryEscape(name) + "/" + id
+	resp, err := c.do("DELETE", uri, nil)
+	if err != nil {
+		return err
+	}
+	_ = resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("Unexpected HTTP response status %v: %s", resp.StatusCode, resp.Status)
+	}
+	return nil
+}
+
+// PurgeMailbox deletes all messages in the given mailbox
+func (c *Client) PurgeMailbox(name string) error {
+	uri := "/api/v1/mailbox/" + url.QueryEscape(name)
+	resp, err := c.do("DELETE", uri, nil)
+	if err != nil {
+		return err
+	}
+	_ = resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("Unexpected HTTP response status %v: %s", resp.StatusCode, resp.Status)
+	}
+	return nil
+}
+
+// MessageHeader represents an Inbucket message sans content
+type MessageHeader struct {
+	*model.JSONMessageHeaderV1
+	client *Client
+}
+
+// GetMessage returns this message with content
+func (h *MessageHeader) GetMessage() (message *Message, err error) {
+	return h.client.GetMessage(h.Mailbox, h.ID)
+}
+
+// GetSource returns the source for this message
+func (h *MessageHeader) GetSource() (*bytes.Buffer, error) {
+	return h.client.GetMessageSource(h.Mailbox, h.ID)
+}
+
+// Delete deletes this message from the mailbox
+func (h *MessageHeader) Delete() error {
+	return h.client.DeleteMessage(h.Mailbox, h.ID)
+}
+
+// Message represents an Inbucket message including content
+type Message struct {
+	*model.JSONMessageV1
+	client *Client
+}
+
+// GetSource returns the source for this message
+func (m *Message) GetSource() (*bytes.Buffer, error) {
+	return m.client.GetMessageSource(m.Mailbox, m.ID)
+}
+
+// Delete deletes this message from the mailbox
+func (m *Message) Delete() error {
+	return m.client.DeleteMessage(m.Mailbox, m.ID)
+}

pkg/rest/client/apiv1_client_test.go

@@ -0,0 +1,356 @@
+package client
+
+import "testing"
+
+func TestClientV1ListMailbox(t *testing.T) {
+	var want, got string
+
+	c, err := New(baseURLStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mth := &mockHTTPClient{}
+	c.client = mth
+
+	// Method under test
+	_, _ = c.ListMailbox("testbox")
+
+	want = "GET"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/testbox"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+}
+
+func TestClientV1GetMessage(t *testing.T) {
+	var want, got string
+
+	c, err := New(baseURLStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mth := &mockHTTPClient{}
+	c.client = mth
+
+	// Method under test
+	_, _ = c.GetMessage("testbox", "20170107T224128-0000")
+
+	want = "GET"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/testbox/20170107T224128-0000"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+}
+
+func TestClientV1MarkSeen(t *testing.T) {
+	var want, got string
+
+	c, err := New(baseURLStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mth := &mockHTTPClient{}
+	c.client = mth
+
+	// Method under test
+	_ = c.MarkSeen("testbox", "20170107T224128-0000")
+
+	want = "PATCH"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/testbox/20170107T224128-0000"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+}
+
+func TestClientV1GetMessageSource(t *testing.T) {
+	var want, got string
+
+	c, err := New(baseURLStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mth := &mockHTTPClient{
+		body: "message source",
+	}
+	c.client = mth
+
+	// Method under test
+	source, err := c.GetMessageSource("testbox", "20170107T224128-0000")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "GET"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/testbox/20170107T224128-0000/source"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+
+	want = "message source"
+	got = source.String()
+	if got != want {
+		t.Errorf("Source == %q, want: %q", got, want)
+	}
+}
+
+func TestClientV1DeleteMessage(t *testing.T) {
+	var want, got string
+
+	c, err := New(baseURLStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mth := &mockHTTPClient{}
+	c.client = mth
+
+	// Method under test
+	err = c.DeleteMessage("testbox", "20170107T224128-0000")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "DELETE"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/testbox/20170107T224128-0000"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+}
+
+func TestClientV1PurgeMailbox(t *testing.T) {
+	var want, got string
+
+	c, err := New(baseURLStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mth := &mockHTTPClient{}
+	c.client = mth
+
+	// Method under test
+	err = c.PurgeMailbox("testbox")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "DELETE"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/testbox"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+}
+
+func TestClientV1MessageHeader(t *testing.T) {
+	var want, got string
+	response := `[
+		{
+			"mailbox":"mailbox1",
+			"id":"id1",
+			"from":"from1",
+			"subject":"subject1",
+			"date":"2017-01-01T00:00:00.000-07:00",
+			"size":100,
+			"seen":true
+		}
+	]`
+
+	c, err := New(baseURLStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mth := &mockHTTPClient{body: response}
+	c.client = mth
+
+	// Method under test
+	headers, err := c.ListMailbox("testbox")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "GET"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/testbox"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+
+	if len(headers) != 1 {
+		t.Fatalf("len(headers) == %v, want 1", len(headers))
+	}
+	header := headers[0]
+
+	want = "mailbox1"
+	got = header.Mailbox
+	if got != want {
+		t.Errorf("Mailbox == %q, want %q", got, want)
+	}
+
+	want = "id1"
+	got = header.ID
+	if got != want {
+		t.Errorf("ID == %q, want %q", got, want)
+	}
+
+	want = "from1"
+	got = header.From
+	if got != want {
+		t.Errorf("From == %q, want %q", got, want)
+	}
+
+	want = "subject1"
+	got = header.Subject
+	if got != want {
+		t.Errorf("Subject == %q, want %q", got, want)
+	}
+
+	wantb := true
+	gotb := header.Seen
+	if gotb != wantb {
+		t.Errorf("Seen == %v, want %v", gotb, wantb)
+	}
+
+	// Test MessageHeader.Delete()
+	mth.body = ""
+	err = header.Delete()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "DELETE"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/mailbox1/id1"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+
+	// Test MessageHeader.GetSource()
+	mth.body = "source1"
+	_, err = header.GetSource()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "GET"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/mailbox1/id1/source"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+
+	// Test MessageHeader.GetMessage()
+	mth.body = `{
+		"mailbox":"mailbox1",
+		"id":"id1",
+		"from":"from1",
+		"subject":"subject1",
+		"date":"2017-01-01T00:00:00.000-07:00",
+		"size":100
+	}`
+	message, err := header.GetMessage()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if message == nil {
+		t.Fatalf("message was nil, wanted a value")
+	}
+
+	want = "GET"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/mailbox1/id1"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+
+	// Test Message.Delete()
+	mth.body = ""
+	err = message.Delete()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "DELETE"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/mailbox1/id1"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+
+	// Test MessageHeader.GetSource()
+	mth.body = "source1"
+	_, err = message.GetSource()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	want = "GET"
+	got = mth.req.Method
+	if got != want {
+		t.Errorf("req.Method == %q, want %q", got, want)
+	}
+
+	want = baseURLStr + "/api/v1/mailbox/mailbox1/id1/source"
+	got = mth.req.URL.String()
+	if got != want {
+		t.Errorf("req.URL == %q, want %q", got, want)
+	}
+}

pkg/rest/client/rest.go

@@ -0,0 +1,81 @@
+package client
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+)
+
+// httpClient allows http.Client to be mocked for tests
+type httpClient interface {
+	Do(*http.Request) (*http.Response, error)
+}
+
+// Generic REST restClient
+type restClient struct {
+	client  httpClient
+	baseURL *url.URL
+}
+
+// do performs an HTTP request with this client and returns the response.
+func (c *restClient) do(method, uri string, body []byte) (*http.Response, error) {
+	rel, err := url.Parse(uri)
+	if err != nil {
+		return nil, err
+	}
+	url := c.baseURL.ResolveReference(rel)
+	var r io.Reader
+	if body != nil {
+		r = bytes.NewReader(body)
+	}
+	req, err := http.NewRequest(method, url.String(), r)
+	if err != nil {
+		return nil, err
+	}
+	return c.client.Do(req)
+}
+
+// doJSON performs an HTTP request with this client and marshalls the JSON response into v.
+func (c *restClient) doJSON(method string, uri string, v interface{}) error {
+	resp, err := c.do(method, uri, nil)
+	if err != nil {
+		return err
+	}
+
+	defer func() {
+		_ = resp.Body.Close()
+	}()
+	if resp.StatusCode == http.StatusOK {
+		if v == nil {
+			return nil
+		}
+		// Decode response body
+		return json.NewDecoder(resp.Body).Decode(v)
+	}
+
+	return fmt.Errorf("Unexpected HTTP response status %v: %s", resp.StatusCode, resp.Status)
+}
+
+// doJSONBody performs an HTTP request with this client and marshalls the JSON response into v.
+func (c *restClient) doJSONBody(method string, uri string, body []byte, v interface{}) error {
+	resp, err := c.do(method, uri, body)
+	if err != nil {
+		return err
+	}
+
+	defer func() {
+		_ = resp.Body.Close()
+	}()
+	if resp.StatusCode == http.StatusOK {
+		if v == nil {
+			return nil
+		}
+		// Decode response body
+		return json.NewDecoder(resp.Body).Decode(v)
+	}
+
+	return fmt.Errorf("Unexpected HTTP response status %v: %s", resp.StatusCode, resp.Status)
+}

pkg/rest/client/rest_test.go

@@ -28,21 +28,36 @@ type mockHTTPClient struct {
 
 func (m *mockHTTPClient) Do(req *http.Request) (resp *http.Response, err error) {
 	m.req = req
+	if m.statusCode == 0 {
+		m.statusCode = 200
+	}
 	resp = &http.Response{
 		StatusCode: m.statusCode,
 		Body:       ioutil.NopCloser(bytes.NewBufferString(m.body)),
 	}
-
 	return
 }
 
+func (m *mockHTTPClient) ReqBody() []byte {
+	r, err := m.req.GetBody()
+	if err != nil {
+		return nil
+	}
+	body, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil
+	}
+	_ = r.Close()
+	return body
+}
+
 func TestDo(t *testing.T) {
 	var want, got string
-
 	mth := &mockHTTPClient{}
 	c := &restClient{mth, baseURL}
+	body := []byte("Test body")
 
-	_, err := c.do("POST", "/dopost")
+	_, err := c.do("POST", "/dopost", body)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -58,19 +73,26 @@ func TestDo(t *testing.T) {
 	if got != want {
 		t.Errorf("req.URL == %q, want %q", got, want)
 	}
+
+	b := mth.ReqBody()
+	if !bytes.Equal(b, body) {
+		t.Errorf("req.Body == %q, want %q", b, body)
+	}
 }
 
 func TestDoJSON(t *testing.T) {
 	var want, got string
 
 	mth := &mockHTTPClient{
-		statusCode: 200,
-		body:       `{"foo": "bar"}`,
+		body: `{"foo": "bar"}`,
 	}
 	c := &restClient{mth, baseURL}
 
 	var v map[string]interface{}
-	c.doJSON("GET", "/doget", &v)
+	err := c.doJSON("GET", "/doget", &v)
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	want = "GET"
 	got = mth.req.Method
@@ -98,7 +120,7 @@ func TestDoJSON(t *testing.T) {
 func TestDoJSONNilV(t *testing.T) {
 	var want, got string
 
-	mth := &mockHTTPClient{statusCode: 200}
+	mth := &mockHTTPClient{}
 	c := &restClient{mth, baseURL}
 
 	err := c.doJSON("GET", "/doget", nil)

pkg/rest/model/apiv1_model.go

@@ -1,7 +1,6 @@
 package model
 
 import (
-	"net/mail"
 	"time"
 )
 
@@ -14,6 +13,7 @@ type JSONMessageHeaderV1 struct {
 	Subject string    `json:"subject"`
 	Date    time.Time `json:"date"`
 	Size    int64     `json:"size"`
+	Seen    bool      `json:"seen"`
 }
 
 // JSONMessageV1 contains the same data as the header plus a JSONMessageBody
@@ -25,11 +25,13 @@ type JSONMessageV1 struct {
 	Subject     string                     `json:"subject"`
 	Date        time.Time                  `json:"date"`
 	Size        int64                      `json:"size"`
+	Seen        bool                       `json:"seen"`
 	Body        *JSONMessageBodyV1         `json:"body"`
-	Header      mail.Header                `json:"header"`
+	Header      map[string][]string        `json:"header"`
 	Attachments []*JSONMessageAttachmentV1 `json:"attachments"`
 }
 
+// JSONMessageAttachmentV1 contains information about a MIME attachment
 type JSONMessageAttachmentV1 struct {
 	FileName     string `json:"filename"`
 	ContentType  string `json:"content-type"`

pkg/rest/routes.go

@@ -0,0 +1,25 @@
+package rest
+
+import "github.com/gorilla/mux"
+import "github.com/jhillyerd/inbucket/pkg/server/web"
+
+// SetupRoutes populates the routes for the REST interface
+func SetupRoutes(r *mux.Router) {
+	// API v1
+	r.Path("/api/v1/mailbox/{name}").Handler(
+		web.Handler(MailboxListV1)).Name("MailboxListV1").Methods("GET")
+	r.Path("/api/v1/mailbox/{name}").Handler(
+		web.Handler(MailboxPurgeV1)).Name("MailboxPurgeV1").Methods("DELETE")
+	r.Path("/api/v1/mailbox/{name}/{id}").Handler(
+		web.Handler(MailboxShowV1)).Name("MailboxShowV1").Methods("GET")
+	r.Path("/api/v1/mailbox/{name}/{id}").Handler(
+		web.Handler(MailboxMarkSeenV1)).Name("MailboxMarkSeenV1").Methods("PATCH")
+	r.Path("/api/v1/mailbox/{name}/{id}").Handler(
+		web.Handler(MailboxDeleteV1)).Name("MailboxDeleteV1").Methods("DELETE")
+	r.Path("/api/v1/mailbox/{name}/{id}/source").Handler(
+		web.Handler(MailboxSourceV1)).Name("MailboxSourceV1").Methods("GET")
+	r.Path("/api/v1/monitor/messages").Handler(
+		web.Handler(MonitorAllMessagesV1)).Name("MonitorAllMessagesV1").Methods("GET")
+	r.Path("/api/v1/monitor/messages/{name}").Handler(
+		web.Handler(MonitorMailboxMessagesV1)).Name("MonitorMailboxMessagesV1").Methods("GET")
+}

pkg/rest/socketv1_controller.go

@@ -5,11 +5,10 @@ import (
 	"time"
 
 	"github.com/gorilla/websocket"
-	"github.com/jhillyerd/inbucket/httpd"
-	"github.com/jhillyerd/inbucket/log"
-	"github.com/jhillyerd/inbucket/msghub"
-	"github.com/jhillyerd/inbucket/rest/model"
-	"github.com/jhillyerd/inbucket/smtpd"
+	"github.com/jhillyerd/inbucket/pkg/msghub"
+	"github.com/jhillyerd/inbucket/pkg/rest/model"
+	"github.com/jhillyerd/inbucket/pkg/server/web"
+	"github.com/rs/zerolog/log"
 )
 
 const (
@@ -63,11 +62,13 @@ func (ml *msgListener) Receive(msg msghub.Message) error {
 
 // WSReader makes sure the websocket client is still connected, discards any messages from client
 func (ml *msgListener) WSReader(conn *websocket.Conn) {
+	slog := log.With().Str("module", "rest").Str("proto", "WebSocket").
+		Str("remote", conn.RemoteAddr().String()).Logger()
 	defer ml.Close()
 	conn.SetReadLimit(maxMessageSize)
 	conn.SetReadDeadline(time.Now().Add(pongWait))
 	conn.SetPongHandler(func(string) error {
-		log.Tracef("HTTP[%v] Got WebSocket pong", conn.RemoteAddr())
+		slog.Debug().Msg("Got pong")
 		conn.SetReadDeadline(time.Now().Add(pongWait))
 		return nil
 	})
@@ -81,9 +82,9 @@ func (ml *msgListener) WSReader(conn *websocket.Conn) {
 				websocket.CloseNoStatusReceived,
 			) {
 				// Unexpected close code
-				log.Warnf("HTTP[%v] WebSocket error: %v", conn.RemoteAddr(), err)
+				slog.Warn().Err(err).Msg("Socket error")
 			} else {
-				log.Tracef("HTTP[%v] Closing WebSocket", conn.RemoteAddr())
+				slog.Debug().Msg("Closing socket")
 			}
 			break
 		}
@@ -128,7 +129,8 @@ func (ml *msgListener) WSWriter(conn *websocket.Conn) {
 				// Write error
 				return
 			}
-			log.Tracef("HTTP[%v] Sent WebSocket ping", conn.RemoteAddr())
+			log.Debug().Str("module", "rest").Str("proto", "WebSocket").
+				Str("remote", conn.RemoteAddr().String()).Msg("Sent ping")
 		}
 	}
 }
@@ -144,52 +146,52 @@ func (ml *msgListener) Close() {
 	}
 }
 
+// MonitorAllMessagesV1 is a web handler which upgrades the connection to a websocket and notifies
+// the client of all messages received.
 func MonitorAllMessagesV1(
-	w http.ResponseWriter, req *http.Request, ctx *httpd.Context) (err error) {
-	// Upgrade to Websocket
+	w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	// Upgrade to Websocket.
 	conn, err := upgrader.Upgrade(w, req, nil)
 	if err != nil {
 		return err
 	}
-	httpd.ExpWebSocketConnectsCurrent.Add(1)
+	web.ExpWebSocketConnectsCurrent.Add(1)
 	defer func() {
 		_ = conn.Close()
-		httpd.ExpWebSocketConnectsCurrent.Add(-1)
+		web.ExpWebSocketConnectsCurrent.Add(-1)
 	}()
-
-	log.Tracef("HTTP[%v] Upgraded to websocket", req.RemoteAddr)
-
-	// Create, register listener; then interact with conn
+	log.Debug().Str("module", "rest").Str("proto", "WebSocket").
+		Str("remote", conn.RemoteAddr().String()).Msg("Upgraded to WebSocket")
+	// Create, register listener; then interact with conn.
 	ml := newMsgListener(ctx.MsgHub, "")
 	go ml.WSWriter(conn)
 	ml.WSReader(conn)
-
 	return nil
 }
 
+// MonitorMailboxMessagesV1 is a web handler which upgrades the connection to a websocket and
+// notifies the client of messages received by a particular mailbox.
 func MonitorMailboxMessagesV1(
-	w http.ResponseWriter, req *http.Request, ctx *httpd.Context) (err error) {
-	name, err := smtpd.ParseMailboxName(ctx.Vars["name"])
+	w http.ResponseWriter, req *http.Request, ctx *web.Context) (err error) {
+	name, err := ctx.Manager.MailboxForAddress(ctx.Vars["name"])
 	if err != nil {
 		return err
 	}
-	// Upgrade to Websocket
+	// Upgrade to Websocket.
 	conn, err := upgrader.Upgrade(w, req, nil)
 	if err != nil {
 		return err
 	}
-	httpd.ExpWebSocketConnectsCurrent.Add(1)
+	web.ExpWebSocketConnectsCurrent.Add(1)
 	defer func() {
 		_ = conn.Close()
-		httpd.ExpWebSocketConnectsCurrent.Add(-1)
+		web.ExpWebSocketConnectsCurrent.Add(-1)
 	}()
-
-	log.Tracef("HTTP[%v] Upgraded to websocket", req.RemoteAddr)
-
-	// Create, register listener; then interact with conn
+	log.Debug().Str("module", "rest").Str("proto", "WebSocket").
+		Str("remote", conn.RemoteAddr().String()).Msg("Upgraded to WebSocket")
+	// Create, register listener; then interact with conn.
 	ml := newMsgListener(ctx.MsgHub, name)
 	go ml.WSWriter(conn)
 	ml.WSReader(conn)
-
 	return nil
 }

pkg/rest/testutils_test.go

@@ -0,0 +1,159 @@
+package rest
+
+import (
+	"bytes"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"strings"
+	"testing"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/msghub"
+	"github.com/jhillyerd/inbucket/pkg/server/web"
+)
+
+func testRestGet(url string) (*httptest.ResponseRecorder, error) {
+	req, err := http.NewRequest("GET", url, nil)
+	req.Header.Add("Accept", "application/json")
+	if err != nil {
+		return nil, err
+	}
+	w := httptest.NewRecorder()
+	web.Router.ServeHTTP(w, req)
+	return w, nil
+}
+
+func testRestPatch(url string, body string) (*httptest.ResponseRecorder, error) {
+	req, err := http.NewRequest("PATCH", url, strings.NewReader(body))
+	req.Header.Add("Accept", "application/json")
+	if err != nil {
+		return nil, err
+	}
+	w := httptest.NewRecorder()
+	web.Router.ServeHTTP(w, req)
+	return w, nil
+}
+
+func setupWebServer(mm message.Manager) *bytes.Buffer {
+	// Capture log output
+	buf := new(bytes.Buffer)
+	log.SetOutput(buf)
+
+	// Have to reset default mux to prevent duplicate routes
+	http.DefaultServeMux = http.NewServeMux()
+	cfg := &config.Root{
+		Web: config.Web{
+			UIDir: "../ui",
+		},
+	}
+	shutdownChan := make(chan bool)
+	web.Initialize(cfg, shutdownChan, mm, &msghub.Hub{})
+	SetupRoutes(web.Router)
+
+	return buf
+}
+
+func decodedBoolEquals(t *testing.T, json interface{}, path string, want bool) {
+	t.Helper()
+	els := strings.Split(path, "/")
+	val, msg := getDecodedPath(json, els...)
+	if msg != "" {
+		t.Errorf("JSON result%s", msg)
+		return
+	}
+	if got, ok := val.(bool); ok {
+		if got == want {
+			return
+		}
+	}
+	t.Errorf("JSON result/%s == %v (%T), want: %v", path, val, val, want)
+}
+
+func decodedNumberEquals(t *testing.T, json interface{}, path string, want float64) {
+	t.Helper()
+	els := strings.Split(path, "/")
+	val, msg := getDecodedPath(json, els...)
+	if msg != "" {
+		t.Errorf("JSON result%s", msg)
+		return
+	}
+	if got, ok := val.(float64); ok {
+		if got == want {
+			return
+		}
+	}
+	t.Errorf("JSON result/%s == %v (%T), want: %v", path, val, val, want)
+}
+
+func decodedStringEquals(t *testing.T, json interface{}, path string, want string) {
+	t.Helper()
+	els := strings.Split(path, "/")
+	val, msg := getDecodedPath(json, els...)
+	if msg != "" {
+		t.Errorf("JSON result%s", msg)
+		return
+	}
+	if got, ok := val.(string); ok {
+		if got == want {
+			return
+		}
+	}
+	t.Errorf("JSON result/%s == %v (%T), want: %v", path, val, val, want)
+}
+
+// getDecodedPath recursively navigates the specified path, returing the requested element.  If
+// something goes wrong, the returned string will contain an explanation.
+//
+// Named path elements require the parent element to be a map[string]interface{}, numbers in square
+// brackets require the parent element to be a []interface{}.
+//
+//     getDecodedPath(o, "users", "[1]", "name")
+//
+// is equivalent to the JavaScript:
+//
+//     o.users[1].name
+//
+func getDecodedPath(o interface{}, path ...string) (interface{}, string) {
+	if len(path) == 0 {
+		return o, ""
+	}
+	if o == nil {
+		return nil, " is nil"
+	}
+	key := path[0]
+	present := false
+	var val interface{}
+	if key[0] == '[' {
+		// Expecting slice.
+		index, err := strconv.Atoi(strings.Trim(key, "[]"))
+		if err != nil {
+			return nil, "/" + key + " is not a slice index"
+		}
+		oslice, ok := o.([]interface{})
+		if !ok {
+			return nil, " is not a slice"
+		}
+		if index >= len(oslice) {
+			return nil, "/" + key + " is out of bounds"
+		}
+		val, present = oslice[index], true
+	} else {
+		// Expecting map.
+		omap, ok := o.(map[string]interface{})
+		if !ok {
+			return nil, " is not a map"
+		}
+		val, present = omap[key]
+	}
+	if !present {
+		return nil, "/" + key + " is missing"
+	}
+	result, msg := getDecodedPath(val, path[1:]...)
+	if msg != "" {
+		return nil, "/" + key + msg
+	}
+	return result, ""
+}

pkg/server/pop3/handler.go

@@ -0,0 +1,601 @@
+package pop3
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+// State tracks the current mode of our POP3 state machine
+type State int
+
+const (
+	// AUTHORIZATION state: the client must now identify and authenticate
+	AUTHORIZATION State = iota
+	// TRANSACTION state: mailbox open, client may now issue commands
+	TRANSACTION
+	// QUIT state: client requests us to end session
+	QUIT
+)
+
+func (s State) String() string {
+	switch s {
+	case AUTHORIZATION:
+		return "AUTHORIZATION"
+	case TRANSACTION:
+		return "TRANSACTION"
+	case QUIT:
+		return "QUIT"
+	}
+	return "Unknown"
+}
+
+var commands = map[string]bool{
+	"QUIT": true,
+	"STAT": true,
+	"LIST": true,
+	"RETR": true,
+	"DELE": true,
+	"NOOP": true,
+	"RSET": true,
+	"TOP":  true,
+	"UIDL": true,
+	"USER": true,
+	"PASS": true,
+	"APOP": true,
+	"CAPA": true,
+}
+
+// Session defines an active POP3 session
+type Session struct {
+	*Server                      // Reference to the server we belong to.
+	id         int               // Session ID number.
+	conn       net.Conn          // Our network connection.
+	remoteHost string            // IP address of client.
+	sendError  error             // Used to bail out of read loop on send error.
+	state      State             // Current session state.
+	reader     *bufio.Reader     // Buffered reader for our net conn.
+	user       string            // Mailbox name.
+	messages   []storage.Message // Slice of messages in mailbox.
+	retain     []bool            // Messages to retain upon UPDATE (true=retain).
+	msgCount   int               // Number of undeleted messages.
+	logger     zerolog.Logger    // Session specific logger.
+	debug      bool              // Print network traffic to stdout.
+}
+
+// NewSession creates a new POP3 session
+func NewSession(server *Server, id int, conn net.Conn, logger zerolog.Logger) *Session {
+	reader := bufio.NewReader(conn)
+	host, _, _ := net.SplitHostPort(conn.RemoteAddr().String())
+	return &Session{
+		Server:     server,
+		id:         id,
+		conn:       conn,
+		state:      AUTHORIZATION,
+		reader:     reader,
+		remoteHost: host,
+		logger:     logger,
+		debug:      server.config.Debug,
+	}
+}
+
+func (s *Session) String() string {
+	return fmt.Sprintf("Session{id: %v, state: %v}", s.id, s.state)
+}
+
+/* Session flow:
+ *  1. Send initial greeting
+ *  2. Receive cmd
+ *  3. If good cmd, respond, optionally change state
+ *  4. If bad cmd, respond error
+ *  5. Goto 2
+ */
+func (s *Server) startSession(id int, conn net.Conn) {
+	logger := log.With().Str("module", "pop3").Str("remote", conn.RemoteAddr().String()).
+		Int("session", id).Logger()
+	logger.Info().Msg("Starting POP3 session")
+	defer func() {
+		if err := conn.Close(); err != nil {
+			logger.Warn().Err(err).Msg("Closing connection")
+		}
+		s.wg.Done()
+	}()
+
+	ssn := NewSession(s, id, conn, logger)
+	ssn.send(fmt.Sprintf("+OK Inbucket POP3 server ready <%v.%v@%v>", os.Getpid(),
+		time.Now().Unix(), s.config.Domain))
+
+	// This is our command reading loop
+	for ssn.state != QUIT && ssn.sendError == nil {
+		line, err := ssn.readLine()
+		if err == nil {
+			if cmd, arg, ok := ssn.parseCmd(line); ok {
+				// Check against valid SMTP commands
+				if cmd == "" {
+					ssn.send("-ERR Speak up")
+					continue
+				}
+				if !commands[cmd] {
+					ssn.send(fmt.Sprintf("-ERR Syntax error, %v command unrecognized", cmd))
+					ssn.logger.Warn().Msgf("Unrecognized command: %v", cmd)
+					continue
+				}
+
+				// Commands we handle in any state
+				switch cmd {
+				case "CAPA":
+					// List our capabilities per RFC2449
+					ssn.send("+OK Capability list follows")
+					ssn.send("TOP")
+					ssn.send("USER")
+					ssn.send("UIDL")
+					ssn.send("IMPLEMENTATION Inbucket")
+					ssn.send(".")
+					continue
+				}
+
+				// Send command to handler for current state
+				switch ssn.state {
+				case AUTHORIZATION:
+					ssn.authorizationHandler(cmd, arg)
+					continue
+				case TRANSACTION:
+					ssn.transactionHandler(cmd, arg)
+					continue
+				}
+				ssn.logger.Error().Msgf("Session entered unexpected state %v", ssn.state)
+				break
+			} else {
+				ssn.send("-ERR Syntax error, command garbled")
+			}
+		} else {
+			// readLine() returned an error
+			if err == io.EOF {
+				switch ssn.state {
+				case AUTHORIZATION:
+					// EOF is common here
+					ssn.logger.Info().Msgf("Client closed connection (state %v)", ssn.state)
+				default:
+					ssn.logger.Warn().Msgf("Got EOF while in state %v", ssn.state)
+				}
+				break
+			}
+			// not an EOF
+			ssn.logger.Warn().Msgf("Connection error: %v", err)
+			if netErr, ok := err.(net.Error); ok {
+				if netErr.Timeout() {
+					ssn.send("-ERR Idle timeout, bye bye")
+					break
+				}
+			}
+			ssn.send("-ERR Connection error, sorry")
+			break
+		}
+	}
+	if ssn.sendError != nil {
+		ssn.logger.Warn().Msgf("Network send error: %v", ssn.sendError)
+	}
+	ssn.logger.Info().Msgf("Closing connection")
+}
+
+// AUTHORIZATION state
+func (s *Session) authorizationHandler(cmd string, args []string) {
+	switch cmd {
+	case "QUIT":
+		s.send("+OK Goodnight and good luck")
+		s.enterState(QUIT)
+	case "USER":
+		if len(args) > 0 {
+			s.user = args[0]
+			s.send(fmt.Sprintf("+OK Hello %v, welcome to Inbucket", s.user))
+		} else {
+			s.send("-ERR Missing username argument")
+		}
+	case "PASS":
+		if s.user == "" {
+			s.ooSeq(cmd)
+		} else {
+			s.loadMailbox()
+			s.send(fmt.Sprintf("+OK Found %v messages for %v", s.msgCount, s.user))
+			s.enterState(TRANSACTION)
+		}
+	case "APOP":
+		if len(args) != 2 {
+			s.logger.Warn().Msgf("Expected two arguments for APOP")
+			s.send("-ERR APOP requires two arguments")
+			return
+		}
+		s.user = args[0]
+		s.loadMailbox()
+		s.send(fmt.Sprintf("+OK Found %v messages for %v", s.msgCount, s.user))
+		s.enterState(TRANSACTION)
+	default:
+		s.ooSeq(cmd)
+	}
+}
+
+// TRANSACTION state
+func (s *Session) transactionHandler(cmd string, args []string) {
+	switch cmd {
+	case "STAT":
+		if len(args) != 0 {
+			s.logger.Warn().Msgf("STAT got an unexpected argument")
+			s.send("-ERR STAT command must have no arguments")
+			return
+		}
+		var count int
+		var size int64
+		for i, msg := range s.messages {
+			if s.retain[i] {
+				count++
+				size += msg.Size()
+			}
+		}
+		s.send(fmt.Sprintf("+OK %v %v", count, size))
+	case "LIST":
+		if len(args) > 1 {
+			s.logger.Warn().Msgf("LIST command had more than 1 argument")
+			s.send("-ERR LIST command must have zero or one argument")
+			return
+		}
+		if len(args) == 1 {
+			msgNum, err := strconv.ParseInt(args[0], 10, 32)
+			if err != nil {
+				s.logger.Warn().Msgf("LIST command argument was not an integer")
+				s.send("-ERR LIST command requires an integer argument")
+				return
+			}
+			if msgNum < 1 {
+				s.logger.Warn().Msgf("LIST command argument was less than 1")
+				s.send("-ERR LIST argument must be greater than 0")
+				return
+			}
+			if int(msgNum) > len(s.messages) {
+				s.logger.Warn().Msgf("LIST command argument was greater than number of messages")
+				s.send("-ERR LIST argument must not exceed the number of messages")
+				return
+			}
+			if !s.retain[msgNum-1] {
+				s.logger.Warn().Msgf("Client tried to LIST a message it had deleted")
+				s.send(fmt.Sprintf("-ERR You deleted message %v", msgNum))
+				return
+			}
+			s.send(fmt.Sprintf("+OK %v %v", msgNum, s.messages[msgNum-1].Size()))
+		} else {
+			s.send(fmt.Sprintf("+OK Listing %v messages", s.msgCount))
+			for i, msg := range s.messages {
+				if s.retain[i] {
+					s.send(fmt.Sprintf("%v %v", i+1, msg.Size()))
+				}
+			}
+			s.send(".")
+		}
+	case "UIDL":
+		if len(args) > 1 {
+			s.logger.Warn().Msgf("UIDL command had more than 1 argument")
+			s.send("-ERR UIDL command must have zero or one argument")
+			return
+		}
+		if len(args) == 1 {
+			msgNum, err := strconv.ParseInt(args[0], 10, 32)
+			if err != nil {
+				s.logger.Warn().Msgf("UIDL command argument was not an integer")
+				s.send("-ERR UIDL command requires an integer argument")
+				return
+			}
+			if msgNum < 1 {
+				s.logger.Warn().Msgf("UIDL command argument was less than 1")
+				s.send("-ERR UIDL argument must be greater than 0")
+				return
+			}
+			if int(msgNum) > len(s.messages) {
+				s.logger.Warn().Msgf("UIDL command argument was greater than number of messages")
+				s.send("-ERR UIDL argument must not exceed the number of messages")
+				return
+			}
+			if !s.retain[msgNum-1] {
+				s.logger.Warn().Msgf("Client tried to UIDL a message it had deleted")
+				s.send(fmt.Sprintf("-ERR You deleted message %v", msgNum))
+				return
+			}
+			s.send(fmt.Sprintf("+OK %v %v", msgNum, s.messages[msgNum-1].ID()))
+		} else {
+			s.send(fmt.Sprintf("+OK Listing %v messages", s.msgCount))
+			for i, msg := range s.messages {
+				if s.retain[i] {
+					s.send(fmt.Sprintf("%v %v", i+1, msg.ID()))
+				}
+			}
+			s.send(".")
+		}
+	case "DELE":
+		if len(args) != 1 {
+			s.logger.Warn().Msgf("DELE command had invalid number of arguments")
+			s.send("-ERR DELE command requires a single argument")
+			return
+		}
+		msgNum, err := strconv.ParseInt(args[0], 10, 32)
+		if err != nil {
+			s.logger.Warn().Msgf("DELE command argument was not an integer")
+			s.send("-ERR DELE command requires an integer argument")
+			return
+		}
+		if msgNum < 1 {
+			s.logger.Warn().Msgf("DELE command argument was less than 1")
+			s.send("-ERR DELE argument must be greater than 0")
+			return
+		}
+		if int(msgNum) > len(s.messages) {
+			s.logger.Warn().Msgf("DELE command argument was greater than number of messages")
+			s.send("-ERR DELE argument must not exceed the number of messages")
+			return
+		}
+		if s.retain[msgNum-1] {
+			s.retain[msgNum-1] = false
+			s.msgCount--
+			s.send(fmt.Sprintf("+OK Deleted message %v", msgNum))
+		} else {
+			s.logger.Warn().Msgf("Client tried to DELE an already deleted message")
+			s.send(fmt.Sprintf("-ERR Message %v has already been deleted", msgNum))
+		}
+	case "RETR":
+		if len(args) != 1 {
+			s.logger.Warn().Msgf("RETR command had invalid number of arguments")
+			s.send("-ERR RETR command requires a single argument")
+			return
+		}
+		msgNum, err := strconv.ParseInt(args[0], 10, 32)
+		if err != nil {
+			s.logger.Warn().Msgf("RETR command argument was not an integer")
+			s.send("-ERR RETR command requires an integer argument")
+			return
+		}
+		if msgNum < 1 {
+			s.logger.Warn().Msgf("RETR command argument was less than 1")
+			s.send("-ERR RETR argument must be greater than 0")
+			return
+		}
+		if int(msgNum) > len(s.messages) {
+			s.logger.Warn().Msgf("RETR command argument was greater than number of messages")
+			s.send("-ERR RETR argument must not exceed the number of messages")
+			return
+		}
+		s.send(fmt.Sprintf("+OK %v bytes follows", s.messages[msgNum-1].Size()))
+		s.sendMessage(s.messages[msgNum-1])
+	case "TOP":
+		if len(args) != 2 {
+			s.logger.Warn().Msgf("TOP command had invalid number of arguments")
+			s.send("-ERR TOP command requires two arguments")
+			return
+		}
+		msgNum, err := strconv.ParseInt(args[0], 10, 32)
+		if err != nil {
+			s.logger.Warn().Msgf("TOP command first argument was not an integer")
+			s.send("-ERR TOP command requires an integer argument")
+			return
+		}
+		if msgNum < 1 {
+			s.logger.Warn().Msgf("TOP command first argument was less than 1")
+			s.send("-ERR TOP first argument must be greater than 0")
+			return
+		}
+		if int(msgNum) > len(s.messages) {
+			s.logger.Warn().Msgf("TOP command first argument was greater than number of messages")
+			s.send("-ERR TOP first argument must not exceed the number of messages")
+			return
+		}
+
+		var lines int64
+		lines, err = strconv.ParseInt(args[1], 10, 32)
+		if err != nil {
+			s.logger.Warn().Msgf("TOP command second argument was not an integer")
+			s.send("-ERR TOP command requires an integer argument")
+			return
+		}
+		if lines < 0 {
+			s.logger.Warn().Msgf("TOP command second argument was negative")
+			s.send("-ERR TOP second argument must be non-negative")
+			return
+		}
+		s.send("+OK Top of message follows")
+		s.sendMessageTop(s.messages[msgNum-1], int(lines))
+	case "QUIT":
+		s.send("+OK We will process your deletes")
+		s.processDeletes()
+		s.enterState(QUIT)
+	case "NOOP":
+		s.send("+OK I have sucessfully done nothing")
+	case "RSET":
+		// Reset session, don't actually delete anything I told you to
+		s.logger.Debug().Msgf("Resetting session state on RSET request")
+		s.reset()
+		s.send("+OK Session reset")
+	default:
+		s.ooSeq(cmd)
+	}
+}
+
+// Send the contents of the message to the client
+func (s *Session) sendMessage(msg storage.Message) {
+	reader, err := msg.Source()
+	if err != nil {
+		s.logger.Error().Msgf("Failed to read message for RETR command")
+		s.send("-ERR Failed to RETR that message, internal error")
+		return
+	}
+	defer func() {
+		if err := reader.Close(); err != nil {
+			s.logger.Error().Msgf("Failed to close message: %v", err)
+		}
+	}()
+
+	scanner := bufio.NewScanner(reader)
+	for scanner.Scan() {
+		line := scanner.Text()
+		// Lines starting with . must be prefixed with another .
+		if strings.HasPrefix(line, ".") {
+			line = "." + line
+		}
+		s.send(line)
+	}
+
+	if err = scanner.Err(); err != nil {
+		s.logger.Error().Msgf("Failed to read message for RETR command")
+		s.send(".")
+		s.send("-ERR Failed to RETR that message, internal error")
+		return
+	}
+	s.send(".")
+}
+
+// Send the headers plus the top N lines to the client
+func (s *Session) sendMessageTop(msg storage.Message, lineCount int) {
+	reader, err := msg.Source()
+	if err != nil {
+		s.logger.Error().Msgf("Failed to read message for RETR command")
+		s.send("-ERR Failed to RETR that message, internal error")
+		return
+	}
+	defer func() {
+		if err := reader.Close(); err != nil {
+			s.logger.Error().Msgf("Failed to close message: %v", err)
+		}
+	}()
+
+	scanner := bufio.NewScanner(reader)
+	inBody := false
+	for scanner.Scan() {
+		line := scanner.Text()
+		// Lines starting with . must be prefixed with another .
+		if strings.HasPrefix(line, ".") {
+			line = "." + line
+		}
+		if inBody {
+			// Check if we need to send anymore lines
+			if lineCount < 1 {
+				break
+			} else {
+				lineCount--
+			}
+		} else {
+			if line == "" {
+				// We've hit the end of the header
+				inBody = true
+			}
+		}
+		s.send(line)
+	}
+
+	if err = scanner.Err(); err != nil {
+		s.logger.Error().Msgf("Failed to read message for RETR command")
+		s.send(".")
+		s.send("-ERR Failed to RETR that message, internal error")
+		return
+	}
+	s.send(".")
+}
+
+// Load the users mailbox
+func (s *Session) loadMailbox() {
+	s.logger = s.logger.With().Str("mailbox", s.user).Logger()
+	m, err := s.store.GetMessages(s.user)
+	if err != nil {
+		s.logger.Error().Msgf("Failed to load messages for %v: %v", s.user, err)
+	}
+	s.messages = m
+	s.retainAll()
+}
+
+// Reset retain flag to true for all messages
+func (s *Session) retainAll() {
+	s.retain = make([]bool, len(s.messages))
+	for i := range s.retain {
+		s.retain[i] = true
+	}
+	s.msgCount = len(s.messages)
+}
+
+// This would be considered the "UPDATE" state in the RFC, but it does not fit
+// with our state-machine design here, since no commands are accepted - it just
+// indicates that the session was closed cleanly and that deletes should be
+// processed.
+func (s *Session) processDeletes() {
+	s.logger.Info().Msgf("Processing deletes")
+	for i, msg := range s.messages {
+		if !s.retain[i] {
+			s.logger.Debug().Str("id", msg.ID()).Msg("Deleting message")
+			if err := s.store.RemoveMessage(s.user, msg.ID()); err != nil {
+				s.logger.Warn().Str("id", msg.ID()).Err(err).Msg("Error deleting message")
+			}
+		}
+	}
+}
+
+func (s *Session) enterState(state State) {
+	s.state = state
+	s.logger.Debug().Msgf("Entering state %v", state)
+}
+
+// nextDeadline calculates the next read or write deadline based on configured timeout.
+func (s *Session) nextDeadline() time.Time {
+	return time.Now().Add(s.config.Timeout)
+}
+
+// Send requested message, store errors in Session.sendError
+func (s *Session) send(msg string) {
+	if err := s.conn.SetWriteDeadline(s.nextDeadline()); err != nil {
+		s.sendError = err
+		return
+	}
+	if _, err := fmt.Fprint(s.conn, msg+"\r\n"); err != nil {
+		s.sendError = err
+		s.logger.Warn().Msgf("Failed to send: %q", msg)
+		return
+	}
+	if s.debug {
+		fmt.Printf("%04d > %v\n", s.id, msg)
+	}
+}
+
+// Reads a line of input
+func (s *Session) readLine() (line string, err error) {
+	if err = s.conn.SetReadDeadline(s.nextDeadline()); err != nil {
+		return "", err
+	}
+	line, err = s.reader.ReadString('\n')
+	if err != nil {
+		return "", err
+	}
+	if s.debug {
+		fmt.Printf("%04d   %v\n", s.id, strings.TrimRight(line, "\r\n"))
+	}
+	return line, nil
+}
+
+func (s *Session) parseCmd(line string) (cmd string, args []string, ok bool) {
+	line = strings.TrimRight(line, "\r\n")
+	if line == "" {
+		return "", nil, true
+	}
+
+	words := strings.Split(line, " ")
+	return strings.ToUpper(words[0]), words[1:], true
+}
+
+func (s *Session) reset() {
+	s.retainAll()
+}
+
+func (s *Session) ooSeq(cmd string) {
+	s.send(fmt.Sprintf("-ERR Command %v is out of sequence", cmd))
+	s.logger.Warn().Msgf("Wasn't expecting %v here", cmd)
+}

pkg/server/pop3/listener.go

@@ -0,0 +1,117 @@
+package pop3
+
+import (
+	"context"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/rs/zerolog/log"
+)
+
+// Server defines an instance of the POP3 server.
+type Server struct {
+	config         config.POP3     // POP3 configuration.
+	store          storage.Store   // Mail store.
+	listener       net.Listener    // TCP listener.
+	globalShutdown chan bool       // Inbucket shutdown signal.
+	wg             *sync.WaitGroup // Waitgroup tracking sessions.
+}
+
+// New creates a new Server struct.
+func New(pop3Config config.POP3, shutdownChan chan bool, store storage.Store) *Server {
+	return &Server{
+		config:         pop3Config,
+		store:          store,
+		globalShutdown: shutdownChan,
+		wg:             new(sync.WaitGroup),
+	}
+}
+
+// Start the server and listen for connections
+func (s *Server) Start(ctx context.Context) {
+	slog := log.With().Str("module", "pop3").Str("phase", "startup").Logger()
+	addr, err := net.ResolveTCPAddr("tcp4", s.config.Addr)
+	if err != nil {
+		slog.Error().Err(err).Msg("Failed to build tcp4 address")
+		s.emergencyShutdown()
+		return
+	}
+	slog.Info().Str("addr", addr.String()).Msg("POP3 listening on tcp4")
+	s.listener, err = net.ListenTCP("tcp4", addr)
+	if err != nil {
+		slog.Error().Err(err).Msg("Failed to start tcp4 listener")
+		s.emergencyShutdown()
+		return
+	}
+	// Listener go routine.
+	go s.serve(ctx)
+	// Wait for shutdown.
+	select {
+	case _ = <-ctx.Done():
+	}
+	slog = log.With().Str("module", "pop3").Str("phase", "shutdown").Logger()
+	slog.Debug().Msg("POP3 shutdown requested, connections will be drained")
+	// Closing the listener will cause the serve() go routine to exit.
+	if err := s.listener.Close(); err != nil {
+		slog.Error().Err(err).Msg("Failed to close POP3 listener")
+	}
+}
+
+// serve is the listen/accept loop.
+func (s *Server) serve(ctx context.Context) {
+	// Handle incoming connections.
+	var tempDelay time.Duration
+	for sid := 1; ; sid++ {
+		if conn, err := s.listener.Accept(); err != nil {
+			if nerr, ok := err.(net.Error); ok && nerr.Temporary() {
+				// Temporary error, sleep for a bit and try again.
+				if tempDelay == 0 {
+					tempDelay = 5 * time.Millisecond
+				} else {
+					tempDelay *= 2
+				}
+				if max := 1 * time.Second; tempDelay > max {
+					tempDelay = max
+				}
+				log.Error().Str("module", "pop3").Err(err).
+					Msgf("POP3 accept error; retrying in %v", tempDelay)
+				time.Sleep(tempDelay)
+				continue
+			} else {
+				// Permanent error.
+				select {
+				case <-ctx.Done():
+					// POP3 is shutting down.
+					return
+				default:
+					// Something went wrong.
+					s.emergencyShutdown()
+					return
+				}
+			}
+		} else {
+			tempDelay = 0
+			s.wg.Add(1)
+			go s.startSession(sid, conn)
+		}
+	}
+}
+
+func (s *Server) emergencyShutdown() {
+	// Shutdown Inbucket
+	select {
+	case _ = <-s.globalShutdown:
+	default:
+		close(s.globalShutdown)
+	}
+}
+
+// Drain causes the caller to block until all active POP3 sessions have finished
+func (s *Server) Drain() {
+	// Wait for sessions to close
+	s.wg.Wait()
+	log.Debug().Str("module", "pop3").Str("phase", "shutdown").Msg("POP3 connections have drained")
+}

pkg/server/smtp/handler.go

@@ -0,0 +1,535 @@
+package smtp
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"net"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/policy"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+// State tracks the current mode of our SMTP state machine.
+type State int
+
+const (
+	// timeStampFormat to use in Received header.
+	timeStampFormat = "Mon, 02 Jan 2006 15:04:05 -0700 (MST)"
+
+	// GREET State: Waiting for HELO
+	GREET State = iota
+	// READY State: Got HELO, waiting for MAIL
+	READY
+	// MAIL State: Got MAIL, accepting RCPTs
+	MAIL
+	// DATA State: Got DATA, waiting for "."
+	DATA
+	// QUIT State: Client requested end of session
+	QUIT
+)
+
+// fromRegex captures the from address and optional BODY=8BITMIME clause.  Matches FROM, while
+// accepting '>' as quoted pair and in double quoted strings (?i) makes the regex case insensitive,
+// (?:) is non-grouping sub-match
+var fromRegex = regexp.MustCompile(
+	"(?i)^FROM:\\s*<((?:\\\\>|[^>])+|\"[^\"]+\"@[^>]+)>( [\\w= ]+)?$")
+
+func (s State) String() string {
+	switch s {
+	case GREET:
+		return "GREET"
+	case READY:
+		return "READY"
+	case MAIL:
+		return "MAIL"
+	case DATA:
+		return "DATA"
+	case QUIT:
+		return "QUIT"
+	}
+	return "Unknown"
+}
+
+var commands = map[string]bool{
+	"HELO": true,
+	"EHLO": true,
+	"MAIL": true,
+	"RCPT": true,
+	"DATA": true,
+	"RSET": true,
+	"SEND": true,
+	"SOML": true,
+	"SAML": true,
+	"VRFY": true,
+	"EXPN": true,
+	"HELP": true,
+	"NOOP": true,
+	"QUIT": true,
+	"TURN": true,
+}
+
+// Session holds the state of an SMTP session
+type Session struct {
+	*Server                          // Server this session belongs to.
+	id           int                 // Session ID.
+	conn         net.Conn            // TCP connection.
+	remoteDomain string              // Remote domain from HELO command.
+	remoteHost   string              // Remote host.
+	sendError    error               // Last network send error.
+	state        State               // Session state machine.
+	reader       *bufio.Reader       // Buffered reading for TCP conn.
+	from         string              // Sender from MAIL command.
+	recipients   []*policy.Recipient // Recipients from RCPT commands.
+	logger       zerolog.Logger      // Session specific logger.
+	debug        bool                // Print network traffic to stdout.
+}
+
+// NewSession creates a new Session for the given connection
+func NewSession(server *Server, id int, conn net.Conn, logger zerolog.Logger) *Session {
+	reader := bufio.NewReader(conn)
+	host, _, _ := net.SplitHostPort(conn.RemoteAddr().String())
+	return &Session{
+		Server:     server,
+		id:         id,
+		conn:       conn,
+		state:      GREET,
+		reader:     reader,
+		remoteHost: host,
+		recipients: make([]*policy.Recipient, 0),
+		logger:     logger,
+		debug:      server.config.Debug,
+	}
+}
+
+func (s *Session) String() string {
+	return fmt.Sprintf("Session{id: %v, state: %v}", s.id, s.state)
+}
+
+/* Session flow:
+ *  1. Send initial greeting
+ *  2. Receive cmd
+ *  3. If good cmd, respond, optionally change state
+ *  4. If bad cmd, respond error
+ *  5. Goto 2
+ */
+func (s *Server) startSession(id int, conn net.Conn) {
+	logger := log.Hook(logHook{}).With().
+		Str("module", "smtp").
+		Str("remote", conn.RemoteAddr().String()).
+		Int("session", id).Logger()
+	logger.Info().Msg("Starting SMTP session")
+	expConnectsCurrent.Add(1)
+	defer func() {
+		if err := conn.Close(); err != nil {
+			logger.Warn().Err(err).Msg("Closing connection")
+		}
+		s.wg.Done()
+		expConnectsCurrent.Add(-1)
+	}()
+
+	ssn := NewSession(s, id, conn, logger)
+	ssn.greet()
+
+	// This is our command reading loop
+	for ssn.state != QUIT && ssn.sendError == nil {
+		if ssn.state == DATA {
+			// Special case, does not use SMTP command format
+			ssn.dataHandler()
+			continue
+		}
+		line, err := ssn.readLine()
+		if err == nil {
+			if cmd, arg, ok := ssn.parseCmd(line); ok {
+				// Check against valid SMTP commands
+				if cmd == "" {
+					ssn.send("500 Speak up")
+					continue
+				}
+				if !commands[cmd] {
+					ssn.send(fmt.Sprintf("500 Syntax error, %v command unrecognized", cmd))
+					ssn.logger.Warn().Msgf("Unrecognized command: %v", cmd)
+					continue
+				}
+
+				// Commands we handle in any state
+				switch cmd {
+				case "SEND", "SOML", "SAML", "EXPN", "HELP", "TURN":
+					// These commands are not implemented in any state
+					ssn.send(fmt.Sprintf("502 %v command not implemented", cmd))
+					ssn.logger.Warn().Msgf("Command %v not implemented by Inbucket", cmd)
+					continue
+				case "VRFY":
+					ssn.send("252 Cannot VRFY user, but will accept message")
+					continue
+				case "NOOP":
+					ssn.send("250 I have sucessfully done nothing")
+					continue
+				case "RSET":
+					// Reset session
+					ssn.logger.Debug().Msgf("Resetting session state on RSET request")
+					ssn.reset()
+					ssn.send("250 Session reset")
+					continue
+				case "QUIT":
+					ssn.send("221 Goodnight and good luck")
+					ssn.enterState(QUIT)
+					continue
+				}
+
+				// Send command to handler for current state
+				switch ssn.state {
+				case GREET:
+					ssn.greetHandler(cmd, arg)
+					continue
+				case READY:
+					ssn.readyHandler(cmd, arg)
+					continue
+				case MAIL:
+					ssn.mailHandler(cmd, arg)
+					continue
+				}
+				ssn.logger.Error().Msgf("Session entered unexpected state %v", ssn.state)
+				break
+			} else {
+				ssn.send("500 Syntax error, command garbled")
+			}
+		} else {
+			// readLine() returned an error
+			if err == io.EOF {
+				switch ssn.state {
+				case GREET, READY:
+					// EOF is common here
+					ssn.logger.Info().Msgf("Client closed connection (state %v)", ssn.state)
+				default:
+					ssn.logger.Warn().Msgf("Got EOF while in state %v", ssn.state)
+				}
+				break
+			}
+			// not an EOF
+			ssn.logger.Warn().Msgf("Connection error: %v", err)
+			if netErr, ok := err.(net.Error); ok {
+				if netErr.Timeout() {
+					ssn.send("221 Idle timeout, bye bye")
+					break
+				}
+			}
+			ssn.send("221 Connection error, sorry")
+			break
+		}
+	}
+	if ssn.sendError != nil {
+		ssn.logger.Warn().Msgf("Network send error: %v", ssn.sendError)
+	}
+	ssn.logger.Info().Msgf("Closing connection")
+}
+
+// GREET state -> waiting for HELO
+func (s *Session) greetHandler(cmd string, arg string) {
+	switch cmd {
+	case "HELO":
+		domain, err := parseHelloArgument(arg)
+		if err != nil {
+			s.send("501 Domain/address argument required for HELO")
+			return
+		}
+		s.remoteDomain = domain
+		s.send("250 Great, let's get this show on the road")
+		s.enterState(READY)
+	case "EHLO":
+		domain, err := parseHelloArgument(arg)
+		if err != nil {
+			s.send("501 Domain/address argument required for EHLO")
+			return
+		}
+		s.remoteDomain = domain
+		s.send("250-Great, let's get this show on the road")
+		s.send("250-8BITMIME")
+		s.send(fmt.Sprintf("250 SIZE %v", s.config.MaxMessageBytes))
+		s.enterState(READY)
+	default:
+		s.ooSeq(cmd)
+	}
+}
+
+func parseHelloArgument(arg string) (string, error) {
+	domain := arg
+	if idx := strings.IndexRune(arg, ' '); idx >= 0 {
+		domain = arg[:idx]
+	}
+	if domain == "" {
+		return "", fmt.Errorf("Invalid domain")
+	}
+	return domain, nil
+}
+
+// READY state -> waiting for MAIL
+func (s *Session) readyHandler(cmd string, arg string) {
+	if cmd == "MAIL" {
+		// Capture group 1: from address.  2: optional params.
+		m := fromRegex.FindStringSubmatch(arg)
+		if m == nil {
+			s.send("501 Was expecting MAIL arg syntax of FROM:<address>")
+			s.logger.Warn().Msgf("Bad MAIL argument: %q", arg)
+			return
+		}
+		from := m[1]
+		if _, _, err := policy.ParseEmailAddress(from); err != nil {
+			s.send("501 Bad sender address syntax")
+			s.logger.Warn().Msgf("Bad address as MAIL arg: %q, %s", from, err)
+			return
+		}
+		// This is where the client may put BODY=8BITMIME, but we already
+		// read the DATA as bytes, so it does not effect our processing.
+		if m[2] != "" {
+			args, ok := s.parseArgs(m[2])
+			if !ok {
+				s.send("501 Unable to parse MAIL ESMTP parameters")
+				s.logger.Warn().Msgf("Bad MAIL argument: %q", arg)
+				return
+			}
+			if args["SIZE"] != "" {
+				size, err := strconv.ParseInt(args["SIZE"], 10, 32)
+				if err != nil {
+					s.send("501 Unable to parse SIZE as an integer")
+					s.logger.Warn().Msgf("Unable to parse SIZE %q as an integer", args["SIZE"])
+					return
+				}
+				if int(size) > s.config.MaxMessageBytes {
+					s.send("552 Max message size exceeded")
+					s.logger.Warn().Msgf("Client wanted to send oversized message: %v", args["SIZE"])
+					return
+				}
+			}
+		}
+		s.from = from
+		s.logger.Info().Msgf("Mail from: %v", from)
+		s.send(fmt.Sprintf("250 Roger, accepting mail from <%v>", from))
+		s.enterState(MAIL)
+	} else {
+		s.ooSeq(cmd)
+	}
+}
+
+// MAIL state -> waiting for RCPTs followed by DATA
+func (s *Session) mailHandler(cmd string, arg string) {
+	switch cmd {
+	case "RCPT":
+		if (len(arg) < 4) || (strings.ToUpper(arg[0:3]) != "TO:") {
+			s.send("501 Was expecting RCPT arg syntax of TO:<address>")
+			s.logger.Warn().Msgf("Bad RCPT argument: %q", arg)
+			return
+		}
+		addr := strings.Trim(arg[3:], "<> ")
+		recip, err := s.addrPolicy.NewRecipient(addr)
+		if err != nil {
+			s.send("501 Bad recipient address syntax")
+			s.logger.Warn().Str("to", addr).Err(err).Msg("Bad address as RCPT arg")
+			return
+		}
+		if !recip.ShouldAccept() {
+			s.logger.Warn().Str("to", addr).Msg("Rejecting recipient domain")
+			s.send("550 Relay not permitted")
+			return
+		}
+		if len(s.recipients) >= s.config.MaxRecipients {
+			s.logger.Warn().Msgf("Limit of %v recipients exceeded", s.config.MaxRecipients)
+			s.send(fmt.Sprintf("552 Limit of %v recipients exceeded", s.config.MaxRecipients))
+			return
+		}
+		s.recipients = append(s.recipients, recip)
+		s.logger.Debug().Str("to", addr).Msg("Recipient added")
+		s.send(fmt.Sprintf("250 I'll make sure <%v> gets this", addr))
+		return
+	case "DATA":
+		if arg != "" {
+			s.send("501 DATA command should not have any arguments")
+			s.logger.Warn().Msgf("Got unexpected args on DATA: %q", arg)
+			return
+		}
+		if len(s.recipients) == 0 {
+			// DATA out of sequence
+			s.ooSeq(cmd)
+			return
+		}
+		s.enterState(DATA)
+		return
+	}
+	s.ooSeq(cmd)
+}
+
+// DATA
+func (s *Session) dataHandler() {
+	s.send("354 Start mail input; end with <CRLF>.<CRLF>")
+	msgBuf := &bytes.Buffer{}
+	for {
+		lineBuf, err := s.readByteLine()
+		if err != nil {
+			if netErr, ok := err.(net.Error); ok {
+				if netErr.Timeout() {
+					s.send("221 Idle timeout, bye bye")
+				}
+			}
+			s.logger.Warn().Msgf("Error: %v while reading", err)
+			s.enterState(QUIT)
+			return
+		}
+		if bytes.Equal(lineBuf, []byte(".\r\n")) || bytes.Equal(lineBuf, []byte(".\n")) {
+			// Mail data complete.
+			tstamp := time.Now().Format(timeStampFormat)
+			for _, recip := range s.recipients {
+				if recip.ShouldStore() {
+					// Generate Received header.
+					prefix := fmt.Sprintf("Received: from %s ([%s]) by %s\r\n  for <%s>; %s\r\n",
+						s.remoteDomain, s.remoteHost, s.config.Domain, recip.Address.Address,
+						tstamp)
+					// Deliver message.
+					_, err := s.manager.Deliver(
+						recip, s.from, s.recipients, prefix, msgBuf.Bytes())
+					if err != nil {
+						s.logger.Error().Msgf("delivery for %v: %v", recip.LocalPart, err)
+						s.send(fmt.Sprintf("451 Failed to store message for %v", recip.LocalPart))
+						s.reset()
+						return
+					}
+				}
+				expReceivedTotal.Add(1)
+			}
+			s.send("250 Mail accepted for delivery")
+			s.logger.Info().Msgf("Message size %v bytes", msgBuf.Len())
+			s.reset()
+			return
+		}
+		// RFC: remove leading periods from DATA.
+		if len(lineBuf) > 0 && lineBuf[0] == '.' {
+			lineBuf = lineBuf[1:]
+		}
+		msgBuf.Write(lineBuf)
+		if msgBuf.Len() > s.config.MaxMessageBytes {
+			s.send("552 Maximum message size exceeded")
+			s.logger.Warn().Msgf("Max message size exceeded while in DATA")
+			s.reset()
+			return
+		}
+	}
+}
+
+func (s *Session) enterState(state State) {
+	s.state = state
+	s.logger.Debug().Msgf("Entering state %v", state)
+}
+
+func (s *Session) greet() {
+	s.send(fmt.Sprintf("220 %v Inbucket SMTP ready", s.config.Domain))
+}
+
+// nextDeadline calculates the next read or write deadline based on configured timeout.
+func (s *Session) nextDeadline() time.Time {
+	return time.Now().Add(s.config.Timeout)
+}
+
+// Send requested message, store errors in Session.sendError
+func (s *Session) send(msg string) {
+	if err := s.conn.SetWriteDeadline(s.nextDeadline()); err != nil {
+		s.sendError = err
+		return
+	}
+	if _, err := fmt.Fprint(s.conn, msg+"\r\n"); err != nil {
+		s.sendError = err
+		s.logger.Warn().Msgf("Failed to send: %q", msg)
+		return
+	}
+	if s.debug {
+		fmt.Printf("%04d > %v\n", s.id, msg)
+	}
+}
+
+// readByteLine reads a line of input, returns byte slice.
+func (s *Session) readByteLine() ([]byte, error) {
+	if err := s.conn.SetReadDeadline(s.nextDeadline()); err != nil {
+		return nil, err
+	}
+	b, err := s.reader.ReadBytes('\n')
+	if err == nil && s.debug {
+		fmt.Printf("%04d   %s\n", s.id, bytes.TrimRight(b, "\r\n"))
+	}
+	return b, err
+}
+
+// Reads a line of input
+func (s *Session) readLine() (line string, err error) {
+	if err = s.conn.SetReadDeadline(s.nextDeadline()); err != nil {
+		return "", err
+	}
+	line, err = s.reader.ReadString('\n')
+	if err != nil {
+		return "", err
+	}
+	if s.debug {
+		fmt.Printf("%04d   %v\n", s.id, strings.TrimRight(line, "\r\n"))
+	}
+	return line, nil
+}
+
+func (s *Session) parseCmd(line string) (cmd string, arg string, ok bool) {
+	line = strings.TrimRight(line, "\r\n")
+	l := len(line)
+	switch {
+	case l == 0:
+		return "", "", true
+	case l < 4:
+		s.logger.Warn().Msgf("Command too short: %q", line)
+		return "", "", false
+	case l == 4:
+		return strings.ToUpper(line), "", true
+	case l == 5:
+		// Too long to be only command, too short to have args
+		s.logger.Warn().Msgf("Mangled command: %q", line)
+		return "", "", false
+	}
+	// If we made it here, command is long enough to have args
+	if line[4] != ' ' {
+		// There wasn't a space after the command?
+		s.logger.Warn().Msgf("Mangled command: %q", line)
+		return "", "", false
+	}
+	// I'm not sure if we should trim the args or not, but we will for now
+	return strings.ToUpper(line[0:4]), strings.Trim(line[5:], " "), true
+}
+
+// parseArgs takes the arguments proceeding a command and files them
+// into a map[string]string after uppercasing each key.  Sample arg
+// string:
+//		" BODY=8BITMIME SIZE=1024"
+// The leading space is mandatory.
+func (s *Session) parseArgs(arg string) (args map[string]string, ok bool) {
+	args = make(map[string]string)
+	re := regexp.MustCompile(` (\w+)=(\w+)`)
+	pm := re.FindAllStringSubmatch(arg, -1)
+	if pm == nil {
+		s.logger.Warn().Msgf("Failed to parse arg string: %q")
+		return nil, false
+	}
+	for _, m := range pm {
+		args[strings.ToUpper(m[1])] = m[2]
+	}
+	s.logger.Debug().Msgf("ESMTP params: %v", args)
+	return args, true
+}
+
+func (s *Session) reset() {
+	s.enterState(READY)
+	s.from = ""
+	s.recipients = nil
+}
+
+func (s *Session) ooSeq(cmd string) {
+	s.send(fmt.Sprintf("503 Command %v is out of sequence", cmd))
+	s.logger.Warn().Msgf("Wasn't expecting %v here", cmd)
+}

pkg/server/smtp/handler_test.go

@@ -1,8 +1,7 @@
-package smtpd
+package smtp
 
 import (
 	"bytes"
-	"context"
 	"fmt"
 	"io"
 
@@ -13,8 +12,11 @@ import (
 	"testing"
 	"time"
 
-	"github.com/jhillyerd/inbucket/config"
-	"github.com/jhillyerd/inbucket/msghub"
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/policy"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/test"
 )
 
 type scriptStep struct {
@@ -24,18 +26,12 @@ type scriptStep struct {
 
 // Test commands in GREET state
 func TestGreetState(t *testing.T) {
-	// Setup mock objects
-	mds := &MockDataStore{}
-	mb1 := &MockMailbox{}
-	mds.On("MailboxFor").Return(mb1, nil)
-
-	server, logbuf, teardown := setupSMTPServer(mds)
+	ds := test.NewStore()
+	server, logbuf, teardown := setupSMTPServer(ds)
 	defer teardown()
 
-	var script []scriptStep
-
 	// Test out some mangled HELOs
-	script = []scriptStep{
+	script := []scriptStep{
 		{"HELO", 501},
 		{"EHLO", 501},
 		{"HELLO", 500},
@@ -85,18 +81,12 @@ func TestGreetState(t *testing.T) {
 
 // Test commands in READY state
 func TestReadyState(t *testing.T) {
-	// Setup mock objects
-	mds := &MockDataStore{}
-	mb1 := &MockMailbox{}
-	mds.On("MailboxFor").Return(mb1, nil)
-
-	server, logbuf, teardown := setupSMTPServer(mds)
+	ds := test.NewStore()
+	server, logbuf, teardown := setupSMTPServer(ds)
 	defer teardown()
 
-	var script []scriptStep
-
 	// Test out some mangled READY commands
-	script = []scriptStep{
+	script := []scriptStep{
 		{"HELO localhost", 250},
 		{"FOOB", 500},
 		{"HELO", 503},
@@ -150,28 +140,12 @@ func TestReadyState(t *testing.T) {
 
 // Test commands in MAIL state
 func TestMailState(t *testing.T) {
-	// Setup mock objects
-	mds := &MockDataStore{}
-	mb1 := &MockMailbox{}
-	msg1 := &MockMessage{}
-	mds.On("MailboxFor").Return(mb1, nil)
-	mb1.On("NewMessage").Return(msg1, nil)
-	mb1.On("Name").Return("u1")
-	msg1.On("ID").Return("")
-	msg1.On("From").Return("")
-	msg1.On("To").Return(make([]string, 0))
-	msg1.On("Date").Return(time.Time{})
-	msg1.On("Subject").Return("")
-	msg1.On("Size").Return(0)
-	msg1.On("Close").Return(nil)
-
+	mds := test.NewStore()
 	server, logbuf, teardown := setupSMTPServer(mds)
 	defer teardown()
 
-	var script []scriptStep
-
 	// Test out some mangled READY commands
-	script = []scriptStep{
+	script := []scriptStep{
 		{"HELO localhost", 250},
 		{"MAIL FROM:<john@gmail.com>", 250},
 		{"FOOB", 500},
@@ -195,13 +169,11 @@ func TestMailState(t *testing.T) {
 		{"RCPT TO:<u1@gmail.com>", 250},
 		{"RCPT TO: <u2@gmail.com>", 250},
 		{"RCPT TO:u3@gmail.com", 250},
+		{"RCPT TO:u3@deny.com", 550},
 		{"RCPT TO: u4@gmail.com", 250},
 		{"RSET", 250},
 		{"MAIL FROM:<john@gmail.com>", 250},
-		{"RCPT TO:<user\\@internal@external.com", 250},
-		{"RCPT TO:<\"first last\"@host.com", 250},
-		{"RCPT TO:<user\\>name@host.com>", 250},
-		{"RCPT TO:<\"user>name\"@host.com>", 250},
+		{`RCPT TO:<"first/last"@host.com`, 250},
 	}
 	if err := playSession(t, server, script); err != nil {
 		t.Error(err)
@@ -267,21 +239,7 @@ func TestMailState(t *testing.T) {
 
 // Test commands in DATA state
 func TestDataState(t *testing.T) {
-	// Setup mock objects
-	mds := &MockDataStore{}
-	mb1 := &MockMailbox{}
-	msg1 := &MockMessage{}
-	mds.On("MailboxFor").Return(mb1, nil)
-	mb1.On("NewMessage").Return(msg1, nil)
-	mb1.On("Name").Return("u1")
-	msg1.On("ID").Return("")
-	msg1.On("From").Return("")
-	msg1.On("To").Return(make([]string, 0))
-	msg1.On("Date").Return(time.Time{})
-	msg1.On("Subject").Return("")
-	msg1.On("Size").Return(0)
-	msg1.On("Close").Return(nil)
-
+	mds := test.NewStore()
 	server, logbuf, teardown := setupSMTPServer(mds)
 	defer teardown()
 
@@ -289,7 +247,6 @@ func TestDataState(t *testing.T) {
 	pipe := setupSMTPSession(server)
 	c := textproto.NewConn(pipe)
 
-	// Get us into DATA state
 	if code, _, err := c.ReadCodeLine(220); err != nil {
 		t.Errorf("Expected a 220 greeting, got %v", code)
 	}
@@ -316,6 +273,33 @@ Hi!
 		t.Errorf("Expected a 250 greeting, got %v", code)
 	}
 
+	// Test with no useful headers.
+	pipe = setupSMTPSession(server)
+	c = textproto.NewConn(pipe)
+	if code, _, err := c.ReadCodeLine(220); err != nil {
+		t.Errorf("Expected a 220 greeting, got %v", code)
+	}
+	script = []scriptStep{
+		{"HELO localhost", 250},
+		{"MAIL FROM:<john@gmail.com>", 250},
+		{"RCPT TO:<u1@gmail.com>", 250},
+		{"DATA", 354},
+	}
+	if err := playScriptAgainst(t, c, script); err != nil {
+		t.Error(err)
+	}
+	// Send a message
+	body = `X-Useless-Header: true
+
+Hi! Can you still deliver this?
+`
+	dw = c.DotWriter()
+	_, _ = io.WriteString(dw, body)
+	_ = dw.Close()
+	if code, _, err := c.ReadCodeLine(250); err != nil {
+		t.Errorf("Expected a 250 greeting, got %v", code)
+	}
+
 	if t.Failed() {
 		// Wait for handler to finish logging
 		time.Sleep(2 * time.Second)
@@ -376,43 +360,41 @@ func (m *mockConn) SetDeadline(t time.Time) error      { return nil }
 func (m *mockConn) SetReadDeadline(t time.Time) error  { return nil }
 func (m *mockConn) SetWriteDeadline(t time.Time) error { return nil }
 
-func setupSMTPServer(ds DataStore) (s *Server, buf *bytes.Buffer, teardown func()) {
-	// Test Server Config
-	cfg := config.SMTPConfig{
-		IP4address:      net.IPv4(127, 0, 0, 1),
-		IP4port:         2500,
-		Domain:          "inbucket.local",
-		DomainNoStore:   "bitbucket.local",
-		MaxRecipients:   5,
-		MaxIdleSeconds:  5,
-		MaxMessageBytes: 5000,
-		StoreMessages:   true,
+func setupSMTPServer(ds storage.Store) (s *Server, buf *bytes.Buffer, teardown func()) {
+	cfg := &config.Root{
+		MailboxNaming: config.FullNaming,
+		SMTP: config.SMTP{
+			Addr:            "127.0.0.1:2500",
+			Domain:          "inbucket.local",
+			MaxRecipients:   5,
+			MaxMessageBytes: 5000,
+			DefaultAccept:   true,
+			RejectDomains:   []string{"deny.com"},
+			Timeout:         5,
+		},
 	}
-
-	// Capture log output
+	// Capture log output.
 	buf = new(bytes.Buffer)
 	log.SetOutput(buf)
-
-	// Create a server, don't start it
+	// Create a server, don't start it.
 	shutdownChan := make(chan bool)
-	ctx, cancel := context.WithCancel(context.Background())
 	teardown = func() {
 		close(shutdownChan)
-		cancel()
 	}
-	s = NewServer(cfg, shutdownChan, ds, msghub.New(ctx, 100))
+	addrPolicy := &policy.Addressing{Config: cfg}
+	manager := &message.StoreManager{Store: ds}
+	s = NewServer(cfg.SMTP, shutdownChan, manager, addrPolicy)
 	return s, buf, teardown
 }
 
 var sessionNum int
 
 func setupSMTPSession(server *Server) net.Conn {
-	// Pair of pipes to communicate
+	// Pair of pipes to communicate.
 	serverConn, clientConn := net.Pipe()
-	// Start the session
-	server.waitgroup.Add(1)
+	// Start the session.
+	server.wg.Add(1)
 	sessionNum++
 	go server.startSession(sessionNum, &mockConn{serverConn})
-
 	return clientConn
 }

pkg/server/smtp/listener.go

@@ -0,0 +1,168 @@
+package smtp
+
+import (
+	"container/list"
+	"context"
+	"expvar"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/metric"
+	"github.com/jhillyerd/inbucket/pkg/policy"
+	"github.com/rs/zerolog/log"
+)
+
+var (
+	// Raw stat collectors
+	expConnectsTotal   = new(expvar.Int)
+	expConnectsCurrent = new(expvar.Int)
+	expReceivedTotal   = new(expvar.Int)
+	expErrorsTotal     = new(expvar.Int)
+	expWarnsTotal      = new(expvar.Int)
+
+	// History of certain stats
+	deliveredHist = list.New()
+	connectsHist  = list.New()
+	errorsHist    = list.New()
+	warnsHist     = list.New()
+
+	// History rendered as comma delim string
+	expReceivedHist = new(expvar.String)
+	expConnectsHist = new(expvar.String)
+	expErrorsHist   = new(expvar.String)
+	expWarnsHist    = new(expvar.String)
+)
+
+func init() {
+	m := expvar.NewMap("smtp")
+	m.Set("ConnectsTotal", expConnectsTotal)
+	m.Set("ConnectsHist", expConnectsHist)
+	m.Set("ConnectsCurrent", expConnectsCurrent)
+	m.Set("ReceivedTotal", expReceivedTotal)
+	m.Set("ReceivedHist", expReceivedHist)
+	m.Set("ErrorsTotal", expErrorsTotal)
+	m.Set("ErrorsHist", expErrorsHist)
+	m.Set("WarnsTotal", expWarnsTotal)
+	m.Set("WarnsHist", expWarnsHist)
+	metric.AddTickerFunc(func() {
+		expReceivedHist.Set(metric.Push(deliveredHist, expReceivedTotal))
+		expConnectsHist.Set(metric.Push(connectsHist, expConnectsTotal))
+		expErrorsHist.Set(metric.Push(errorsHist, expErrorsTotal))
+		expWarnsHist.Set(metric.Push(warnsHist, expWarnsTotal))
+	})
+}
+
+// Server holds the configuration and state of our SMTP server.
+type Server struct {
+	config         config.SMTP        // SMTP configuration.
+	addrPolicy     *policy.Addressing // Address policy.
+	globalShutdown chan bool          // Shuts down Inbucket.
+	manager        message.Manager    // Used to deliver messages.
+	listener       net.Listener       // Incoming network connections.
+	wg             *sync.WaitGroup    // Waitgroup tracks individual sessions.
+}
+
+// NewServer creates a new Server instance with the specificed config.
+func NewServer(
+	smtpConfig config.SMTP,
+	globalShutdown chan bool,
+	manager message.Manager,
+	apolicy *policy.Addressing,
+) *Server {
+	return &Server{
+		config:         smtpConfig,
+		globalShutdown: globalShutdown,
+		manager:        manager,
+		addrPolicy:     apolicy,
+		wg:             new(sync.WaitGroup),
+	}
+}
+
+// Start the listener and handle incoming connections.
+func (s *Server) Start(ctx context.Context) {
+	slog := log.With().Str("module", "smtp").Str("phase", "startup").Logger()
+	addr, err := net.ResolveTCPAddr("tcp4", s.config.Addr)
+	if err != nil {
+		slog.Error().Err(err).Msg("Failed to build tcp4 address")
+		s.emergencyShutdown()
+		return
+	}
+	slog.Info().Str("addr", addr.String()).Msg("SMTP listening on tcp4")
+	s.listener, err = net.ListenTCP("tcp4", addr)
+	if err != nil {
+		slog.Error().Err(err).Msg("Failed to start tcp4 listener")
+		s.emergencyShutdown()
+		return
+	}
+	// Listener go routine.
+	go s.serve(ctx)
+	// Wait for shutdown.
+	<-ctx.Done()
+	slog = log.With().Str("module", "smtp").Str("phase", "shutdown").Logger()
+	slog.Debug().Msg("SMTP shutdown requested, connections will be drained")
+	// Closing the listener will cause the serve() go routine to exit.
+	if err := s.listener.Close(); err != nil {
+		slog.Error().Err(err).Msg("Failed to close SMTP listener")
+	}
+}
+
+// serve is the listen/accept loop.
+func (s *Server) serve(ctx context.Context) {
+	// Handle incoming connections.
+	var tempDelay time.Duration
+	for sessionID := 1; ; sessionID++ {
+		if conn, err := s.listener.Accept(); err != nil {
+			// There was an error accepting the connection.
+			if nerr, ok := err.(net.Error); ok && nerr.Temporary() {
+				// Temporary error, sleep for a bit and try again.
+				if tempDelay == 0 {
+					tempDelay = 5 * time.Millisecond
+				} else {
+					tempDelay *= 2
+				}
+				if max := 1 * time.Second; tempDelay > max {
+					tempDelay = max
+				}
+				log.Error().Str("module", "smtp").Err(err).
+					Msgf("SMTP accept error; retrying in %v", tempDelay)
+				time.Sleep(tempDelay)
+				continue
+			} else {
+				// Permanent error.
+				select {
+				case <-ctx.Done():
+					// SMTP is shutting down.
+					return
+				default:
+					// Something went wrong.
+					s.emergencyShutdown()
+					return
+				}
+			}
+		} else {
+			tempDelay = 0
+			expConnectsTotal.Add(1)
+			s.wg.Add(1)
+			go s.startSession(sessionID, conn)
+		}
+	}
+}
+
+func (s *Server) emergencyShutdown() {
+	// Shutdown Inbucket.
+	select {
+	case <-s.globalShutdown:
+	default:
+		close(s.globalShutdown)
+	}
+}
+
+// Drain causes the caller to block until all active SMTP sessions have finished
+func (s *Server) Drain() {
+	// Wait for sessions to close.
+	s.wg.Wait()
+	log.Debug().Str("module", "smtp").Str("phase", "shutdown").Msg("SMTP connections have drained")
+}

pkg/server/smtp/loghook.go

@@ -0,0 +1,15 @@
+package smtp
+
+import "github.com/rs/zerolog"
+
+type logHook struct{}
+
+// Run implements a zerolog hook that updates the SMTP warning/error expvars.
+func (h logHook) Run(e *zerolog.Event, level zerolog.Level, msg string) {
+	switch level {
+	case zerolog.WarnLevel:
+		expWarnsTotal.Add(1)
+	case zerolog.ErrorLevel:
+		expErrorsTotal.Add(1)
+	}
+}

pkg/server/web/context.go

@@ -1,4 +1,4 @@
-package httpd
+package web
 
 import (
 	"net/http"
@@ -6,19 +6,21 @@ import (
 
 	"github.com/gorilla/mux"
 	"github.com/gorilla/sessions"
-	"github.com/jhillyerd/inbucket/config"
-	"github.com/jhillyerd/inbucket/msghub"
-	"github.com/jhillyerd/inbucket/smtpd"
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/msghub"
 )
 
 // Context is passed into every request handler function
+// TODO remove redundant web config
 type Context struct {
-	Vars      map[string]string
-	Session   *sessions.Session
-	DataStore smtpd.DataStore
-	MsgHub    *msghub.Hub
-	WebConfig config.WebConfig
-	IsJSON    bool
+	Vars       map[string]string
+	Session    *sessions.Session
+	MsgHub     *msghub.Hub
+	Manager    message.Manager
+	RootConfig *config.Root
+	WebConfig  config.Web
+	IsJSON     bool
 }
 
 // Close the Context (currently does nothing)
@@ -57,12 +59,13 @@ func NewContext(req *http.Request) (*Context, error) {
 		err = nil
 	}
 	ctx := &Context{
-		Vars:      vars,
-		Session:   sess,
-		DataStore: DataStore,
-		MsgHub:    msgHub,
-		WebConfig: webConfig,
-		IsJSON:    headerMatch(req, "Accept", "application/json"),
+		Vars:       vars,
+		Session:    sess,
+		MsgHub:     msgHub,
+		Manager:    manager,
+		RootConfig: rootConfig,
+		WebConfig:  rootConfig.Web,
+		IsJSON:     headerMatch(req, "Accept", "application/json"),
 	}
 	return ctx, err
 }

pkg/server/web/helpers.go

@@ -1,4 +1,4 @@
-package httpd
+package web
 
 import (
 	"fmt"
@@ -8,13 +8,14 @@ import (
 	"strings"
 	"time"
 
-	"github.com/jhillyerd/inbucket/log"
+	"github.com/rs/zerolog/log"
 )
 
 // TemplateFuncs declares functions made available to all templates (including partials)
 var TemplateFuncs = template.FuncMap{
 	"friendlyTime": FriendlyTime,
 	"reverse":      Reverse,
+	"stringsJoin":  strings.Join,
 	"textToHtml":   TextToHTML,
 }
 
@@ -42,7 +43,8 @@ func Reverse(name string, things ...interface{}) string {
 	// Grab the route
 	u, err := Router.Get(name).URL(strs...)
 	if err != nil {
-		log.Errorf("Failed to reverse route: %v", err)
+		log.Error().Str("module", "web").Str("name", name).Err(err).
+			Msg("Failed to reverse route")
 		return "/ROUTE-ERROR"
 	}
 	return u.Path

pkg/server/web/helpers_test.go

@@ -1,4 +1,4 @@
-package httpd
+package web
 
 import (
 	"html/template"

pkg/server/web/rest.go

@@ -1,4 +1,4 @@
-package httpd
+package web
 
 import (
 	"encoding/json"

pkg/server/web/server.go

@@ -1,38 +1,41 @@
-// Package httpd provides the plumbing for Inbucket's web GUI and RESTful API
-package httpd
+// Package web provides the plumbing for Inbucket's web GUI and RESTful API
+package web
 
 import (
 	"context"
 	"expvar"
-	"fmt"
 	"net"
 	"net/http"
+	"path/filepath"
 	"time"
 
 	"github.com/gorilla/mux"
 	"github.com/gorilla/securecookie"
 	"github.com/gorilla/sessions"
-	"github.com/jhillyerd/inbucket/config"
-	"github.com/jhillyerd/inbucket/log"
-	"github.com/jhillyerd/inbucket/msghub"
-	"github.com/jhillyerd/inbucket/smtpd"
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/msghub"
+	"github.com/rs/zerolog/log"
 )
 
 // Handler is a function type that handles an HTTP request in Inbucket
 type Handler func(http.ResponseWriter, *http.Request, *Context) error
 
-var (
-	// DataStore is where all the mailboxes and messages live
-	DataStore smtpd.DataStore
+const (
+	staticDir   = "static"
+	templateDir = "templates"
+)
 
+var (
 	// msgHub holds a reference to the message pub/sub system
-	msgHub *msghub.Hub
+	msgHub  *msghub.Hub
+	manager message.Manager
 
 	// Router is shared between httpd, webui and rest packages. It sends
 	// incoming requests to the correct handler function
 	Router = mux.NewRouter()
 
-	webConfig      config.WebConfig
+	rootConfig     *config.Root
 	server         *http.Server
 	listener       net.Listener
 	sessionStore   sessions.Store
@@ -49,51 +52,55 @@ func init() {
 
 // Initialize sets up things for unit tests or the Start() method
 func Initialize(
-	cfg config.WebConfig,
+	conf *config.Root,
 	shutdownChan chan bool,
-	ds smtpd.DataStore,
+	mm message.Manager,
 	mh *msghub.Hub) {
 
-	webConfig = cfg
+	rootConfig = conf
 	globalShutdown = shutdownChan
 
 	// NewContext() will use this DataStore for the web handlers
-	DataStore = ds
 	msgHub = mh
+	manager = mm
 
 	// Content Paths
-	log.Infof("HTTP templates mapped to %q", cfg.TemplateDir)
-	log.Infof("HTTP static content mapped to %q", cfg.PublicDir)
+	staticPath := filepath.Join(conf.Web.UIDir, staticDir)
+	log.Info().Str("module", "web").Str("phase", "startup").Str("path", conf.Web.UIDir).
+		Msg("Web UI content mapped")
 	Router.PathPrefix("/public/").Handler(http.StripPrefix("/public/",
-		http.FileServer(http.Dir(cfg.PublicDir))))
+		http.FileServer(http.Dir(staticPath))))
 	http.Handle("/", Router)
 
 	// Session cookie setup
-	if cfg.CookieAuthKey == "" {
-		log.Infof("HTTP generating random cookie.auth.key")
+	if conf.Web.CookieAuthKey == "" {
+		log.Info().Str("module", "web").Str("phase", "startup").
+			Msg("Generating random cookie.auth.key")
 		sessionStore = sessions.NewCookieStore(securecookie.GenerateRandomKey(64))
 	} else {
-		log.Tracef("HTTP using configured cookie.auth.key")
-		sessionStore = sessions.NewCookieStore([]byte(cfg.CookieAuthKey))
+		log.Info().Str("module", "web").Str("phase", "startup").
+			Msg("Using configured cookie.auth.key")
+		sessionStore = sessions.NewCookieStore([]byte(conf.Web.CookieAuthKey))
 	}
 }
 
 // Start begins listening for HTTP requests
 func Start(ctx context.Context) {
-	addr := fmt.Sprintf("%v:%v", webConfig.IP4address, webConfig.IP4port)
 	server = &http.Server{
-		Addr:         addr,
+		Addr:         rootConfig.Web.Addr,
 		Handler:      nil,
 		ReadTimeout:  60 * time.Second,
 		WriteTimeout: 60 * time.Second,
 	}
 
 	// We don't use ListenAndServe because it lacks a way to close the listener
-	log.Infof("HTTP listening on TCP4 %v", addr)
+	log.Info().Str("module", "web").Str("phase", "startup").Str("addr", server.Addr).
+		Msg("HTTP listening on tcp4")
 	var err error
-	listener, err = net.Listen("tcp", addr)
+	listener, err = net.Listen("tcp", server.Addr)
 	if err != nil {
-		log.Errorf("HTTP failed to start TCP4 listener: %v", err)
+		log.Error().Str("module", "web").Str("phase", "startup").Err(err).
+			Msg("HTTP failed to start TCP4 listener")
 		emergencyShutdown()
 		return
 	}
@@ -104,12 +111,14 @@ func Start(ctx context.Context) {
 	// Wait for shutdown
 	select {
 	case _ = <-ctx.Done():
-		log.Tracef("HTTP server shutting down on request")
+		log.Debug().Str("module", "web").Str("phase", "shutdown").
+			Msg("HTTP server shutting down on request")
 	}
 
 	// Closing the listener will cause the serve() go routine to exit
 	if err := listener.Close(); err != nil {
-		log.Errorf("Failed to close HTTP listener: %v", err)
+		log.Debug().Str("module", "web").Str("phase", "shutdown").Err(err).
+			Msg("Failed to close HTTP listener")
 	}
 }
 
@@ -122,7 +131,8 @@ func serve(ctx context.Context) {
 	case _ = <-ctx.Done():
 		// Nop
 	default:
-		log.Errorf("HTTP server failed: %v", err)
+		log.Error().Str("module", "web").Str("phase", "startup").Err(err).
+			Msg("HTTP server failed")
 		emergencyShutdown()
 		return
 	}
@@ -133,17 +143,19 @@ func (h Handler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	// Create the context
 	ctx, err := NewContext(req)
 	if err != nil {
-		log.Errorf("HTTP failed to create context: %v", err)
+		log.Error().Str("module", "web").Err(err).Msg("HTTP failed to create context")
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 	defer ctx.Close()
 
 	// Run the handler, grab the error, and report it
-	log.Tracef("HTTP[%v] %v %v %q", req.RemoteAddr, req.Proto, req.Method, req.RequestURI)
+	log.Debug().Str("module", "web").Str("remote", req.RemoteAddr).Str("proto", req.Proto).
+		Str("method", req.Method).Str("path", req.RequestURI).Msg("Request")
 	err = h(w, req, ctx)
 	if err != nil {
-		log.Errorf("HTTP error handling %q: %v", req.RequestURI, err)
+		log.Error().Str("module", "web").Str("path", req.RequestURI).Err(err).
+			Msg("Error handling request")
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}

pkg/server/web/template.go

@@ -1,14 +1,13 @@
-package httpd
+package web
 
 import (
 	"html/template"
 	"net/http"
 	"path"
 	"path/filepath"
-	"strings"
 	"sync"
 
-	"github.com/jhillyerd/inbucket/log"
+	"github.com/rs/zerolog/log"
 )
 
 var cachedMutex sync.Mutex
@@ -20,7 +19,8 @@ var cachedPartials = map[string]*template.Template{}
 func RenderTemplate(name string, w http.ResponseWriter, data interface{}) error {
 	t, err := ParseTemplate(name, false)
 	if err != nil {
-		log.Errorf("Error in template '%v': %v", name, err)
+		log.Error().Str("module", "web").Str("path", name).Err(err).
+			Msg("Error in template")
 		return err
 	}
 	w.Header().Set("Expires", "-1")
@@ -32,7 +32,8 @@ func RenderTemplate(name string, w http.ResponseWriter, data interface{}) error
 func RenderPartial(name string, w http.ResponseWriter, data interface{}) error {
 	t, err := ParseTemplate(name, true)
 	if err != nil {
-		log.Errorf("Error in template '%v': %v", name, err)
+		log.Error().Str("module", "web").Str("path", name).Err(err).
+			Msg("Error in template")
 		return err
 	}
 	w.Header().Set("Expires", "-1")
@@ -49,9 +50,8 @@ func ParseTemplate(name string, partial bool) (*template.Template, error) {
 		return t, nil
 	}
 
-	tempPath := strings.Replace(name, "/", string(filepath.Separator), -1)
-	tempFile := filepath.Join(webConfig.TemplateDir, tempPath)
-	log.Tracef("Parsing template %v", tempFile)
+	tempFile := filepath.Join(rootConfig.Web.UIDir, templateDir, filepath.FromSlash(name))
+	log.Debug().Str("module", "web").Str("path", name).Msg("Parsing template")
 
 	var err error
 	var t *template.Template
@@ -62,19 +62,20 @@ func ParseTemplate(name string, partial bool) (*template.Template, error) {
 		t, err = t.ParseFiles(tempFile)
 	} else {
 		t = template.New("_base.html").Funcs(TemplateFuncs)
-		t, err = t.ParseFiles(filepath.Join(webConfig.TemplateDir, "_base.html"), tempFile)
+		t, err = t.ParseFiles(
+			filepath.Join(rootConfig.Web.UIDir, templateDir, "_base.html"), tempFile)
 	}
 	if err != nil {
 		return nil, err
 	}
 
 	// Allows us to disable caching for theme development
-	if webConfig.TemplateCache {
+	if rootConfig.Web.TemplateCache {
 		if partial {
-			log.Tracef("Caching partial %v", name)
+			log.Debug().Str("module", "web").Str("path", name).Msg("Caching partial")
 			cachedTemplates[name] = t
 		} else {
-			log.Tracef("Caching template %v", name)
+			log.Debug().Str("module", "web").Str("path", name).Msg("Caching template")
 			cachedTemplates[name] = t
 		}
 	}

pkg/storage/file/fmessage.go

@@ -0,0 +1,104 @@
+package file
+
+import (
+	"io"
+	"net/mail"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/rs/zerolog/log"
+)
+
+// Message implements Message and contains a little bit of data about a
+// particular email message, and methods to retrieve the rest of it from disk.
+type Message struct {
+	mailbox *mbox
+	// Stored in GOB
+	Fid      string
+	Fdate    time.Time
+	Ffrom    *mail.Address
+	Fto      []*mail.Address
+	Fsubject string
+	Fsize    int64
+	Fseen    bool
+}
+
+// newMessage creates a new FileMessage object and sets the Date and ID fields.
+// It will also delete messages over messageCap if configured.
+func (mb *mbox) newMessage() (*Message, error) {
+	// Load index
+	if !mb.indexLoaded {
+		if err := mb.readIndex(); err != nil {
+			return nil, err
+		}
+	}
+	// Delete old messages over messageCap
+	if mb.store.messageCap > 0 {
+		for len(mb.messages) >= mb.store.messageCap {
+			log.Info().Str("module", "storage").Str("mailbox", mb.name).
+				Msg("Mailbox over message cap")
+			id := mb.messages[0].ID()
+			if err := mb.removeMessage(id); err != nil {
+				log.Error().Str("module", "storage").Str("mailbox", mb.name).Str("id", id).
+					Err(err).Msg("Unable to delete message")
+			}
+		}
+	}
+	date := time.Now()
+	id := generateID(date)
+	return &Message{mailbox: mb, Fid: id, Fdate: date}, nil
+}
+
+// Mailbox returns the name of the mailbox this message resides in.
+func (m *Message) Mailbox() string {
+	return m.mailbox.name
+}
+
+// ID gets the ID of the Message
+func (m *Message) ID() string {
+	return m.Fid
+}
+
+// Date returns the date/time this Message was received by Inbucket
+func (m *Message) Date() time.Time {
+	return m.Fdate
+}
+
+// From returns the value of the Message From header
+func (m *Message) From() *mail.Address {
+	return m.Ffrom
+}
+
+// To returns the value of the Message To header
+func (m *Message) To() []*mail.Address {
+	return m.Fto
+}
+
+// Subject returns the value of the Message Subject header
+func (m *Message) Subject() string {
+	return m.Fsubject
+}
+
+// Size returns the size of the Message on disk in bytes
+func (m *Message) Size() int64 {
+	return m.Fsize
+}
+
+func (m *Message) rawPath() string {
+	return filepath.Join(m.mailbox.path, m.Fid+".raw")
+}
+
+// Source opens the .raw portion of a Message as an io.ReadCloser
+func (m *Message) Source() (reader io.ReadCloser, err error) {
+	file, err := os.Open(m.rawPath())
+	if err != nil {
+		return nil, err
+	}
+	return file, nil
+}
+
+// Seen returns the seen flag value.
+func (m *Message) Seen() bool {
+	return m.Fseen
+}

pkg/storage/file/fstore.go

@@ -0,0 +1,267 @@
+package file
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/stringutil"
+	"github.com/rs/zerolog/log"
+)
+
+// Name of index file in each mailbox
+const indexFileName = "index.gob"
+
+var (
+	// countChannel is filled with a sequential numbers (0000..9999), which are
+	// used by generateID() to generate unique message IDs.  It's global
+	// because we only want one regardless of the number of DataStore objects
+	countChannel = make(chan int, 10)
+)
+
+func init() {
+	// Start generator
+	go countGenerator(countChannel)
+}
+
+// Populates the channel with numbers
+func countGenerator(c chan int) {
+	for i := 0; true; i = (i + 1) % 10000 {
+		c <- i
+	}
+}
+
+// Store implements DataStore aand is the root of the mail storage
+// hiearchy.  It provides access to Mailbox objects
+type Store struct {
+	hashLock   storage.HashLock
+	path       string
+	mailPath   string
+	messageCap int
+}
+
+// New creates a new DataStore object using the specified path
+func New(cfg config.Storage) (storage.Store, error) {
+	path := cfg.Params["path"]
+	if path == "" {
+		return nil, fmt.Errorf("'path' parameter not specified")
+	}
+	mailPath := filepath.Join(path, "mail")
+	if _, err := os.Stat(mailPath); err != nil {
+		// Mail datastore does not yet exist
+		if err = os.MkdirAll(mailPath, 0770); err != nil {
+			log.Error().Str("module", "storage").Str("path", mailPath).Err(err).
+				Msg("Error creating dir")
+		}
+	}
+	return &Store{path: path, mailPath: mailPath, messageCap: cfg.MailboxMsgCap}, nil
+}
+
+// AddMessage adds a message to the specified mailbox.
+func (fs *Store) AddMessage(m storage.Message) (id string, err error) {
+	mb := fs.mbox(m.Mailbox())
+	mb.Lock()
+	defer mb.Unlock()
+	r, err := m.Source()
+	if err != nil {
+		return "", err
+	}
+	// Create a new message.
+	fm, err := mb.newMessage()
+	if err != nil {
+		return "", err
+	}
+	// Ensure mailbox directory exists.
+	if err := mb.createDir(); err != nil {
+		return "", err
+	}
+	// Write the message content
+	file, err := os.Create(fm.rawPath())
+	if err != nil {
+		return "", err
+	}
+	w := bufio.NewWriter(file)
+	size, err := io.Copy(w, r)
+	if err != nil {
+		// Try to remove the file
+		_ = file.Close()
+		_ = os.Remove(fm.rawPath())
+		return "", err
+	}
+	_ = r.Close()
+	if err := w.Flush(); err != nil {
+		// Try to remove the file
+		_ = file.Close()
+		_ = os.Remove(fm.rawPath())
+		return "", err
+	}
+	if err := file.Close(); err != nil {
+		// Try to remove the file
+		_ = os.Remove(fm.rawPath())
+		return "", err
+	}
+	// Update the index.
+	fm.Fdate = m.Date()
+	fm.Ffrom = m.From()
+	fm.Fto = m.To()
+	fm.Fsize = size
+	fm.Fsubject = m.Subject()
+	mb.messages = append(mb.messages, fm)
+	if err := mb.writeIndex(); err != nil {
+		// Try to remove the file
+		_ = os.Remove(fm.rawPath())
+		return "", err
+	}
+	return fm.Fid, nil
+}
+
+// GetMessage returns the messages in the named mailbox, or an error.
+func (fs *Store) GetMessage(mailbox, id string) (storage.Message, error) {
+	mb := fs.mbox(mailbox)
+	mb.RLock()
+	defer mb.RUnlock()
+	return mb.getMessage(id)
+}
+
+// GetMessages returns the messages in the named mailbox, or an error.
+func (fs *Store) GetMessages(mailbox string) ([]storage.Message, error) {
+	mb := fs.mbox(mailbox)
+	mb.RLock()
+	defer mb.RUnlock()
+	return mb.getMessages()
+}
+
+// MarkSeen flags the message as having been read.
+func (fs *Store) MarkSeen(mailbox, id string) error {
+	mb := fs.mbox(mailbox)
+	mb.Lock()
+	defer mb.Unlock()
+	if !mb.indexLoaded {
+		if err := mb.readIndex(); err != nil {
+			return err
+		}
+	}
+	for _, m := range mb.messages {
+		if m.Fid == id {
+			if m.Fseen {
+				// Already marked seen.
+				return nil
+			}
+			m.Fseen = true
+			break
+		}
+	}
+	return mb.writeIndex()
+}
+
+// RemoveMessage deletes a message by ID from the specified mailbox.
+func (fs *Store) RemoveMessage(mailbox, id string) error {
+	mb := fs.mbox(mailbox)
+	mb.Lock()
+	defer mb.Unlock()
+	return mb.removeMessage(id)
+}
+
+// PurgeMessages deletes all messages in the named mailbox, or returns an error.
+func (fs *Store) PurgeMessages(mailbox string) error {
+	mb := fs.mbox(mailbox)
+	mb.Lock()
+	defer mb.Unlock()
+	return mb.purge()
+}
+
+// VisitMailboxes accepts a function that will be called with the messages in each mailbox while it
+// continues to return true.
+func (fs *Store) VisitMailboxes(f func([]storage.Message) (cont bool)) error {
+	infos1, err := ioutil.ReadDir(fs.mailPath)
+	if err != nil {
+		return err
+	}
+	// Loop over level 1 directories
+	for _, inf1 := range infos1 {
+		if inf1.IsDir() {
+			l1 := inf1.Name()
+			infos2, err := ioutil.ReadDir(filepath.Join(fs.mailPath, l1))
+			if err != nil {
+				return err
+			}
+			// Loop over level 2 directories
+			for _, inf2 := range infos2 {
+				if inf2.IsDir() {
+					l2 := inf2.Name()
+					infos3, err := ioutil.ReadDir(filepath.Join(fs.mailPath, l1, l2))
+					if err != nil {
+						return err
+					}
+					// Loop over mailboxes
+					for _, inf3 := range infos3 {
+						if inf3.IsDir() {
+							mb := fs.mboxFromHash(inf3.Name())
+							mb.RLock()
+							msgs, err := mb.getMessages()
+							mb.RUnlock()
+							if err != nil {
+								return err
+							}
+							if !f(msgs) {
+								return nil
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// mbox returns the named mailbox.
+func (fs *Store) mbox(mailbox string) *mbox {
+	hash := stringutil.HashMailboxName(mailbox)
+	s1 := hash[0:3]
+	s2 := hash[0:6]
+	path := filepath.Join(fs.mailPath, s1, s2, hash)
+	indexPath := filepath.Join(path, indexFileName)
+	return &mbox{
+		RWMutex:   fs.hashLock.Get(hash),
+		store:     fs,
+		name:      mailbox,
+		dirName:   hash,
+		path:      path,
+		indexPath: indexPath,
+	}
+}
+
+// mboxFromPath constructs a mailbox based on name hash.
+func (fs *Store) mboxFromHash(hash string) *mbox {
+	s1 := hash[0:3]
+	s2 := hash[0:6]
+	path := filepath.Join(fs.mailPath, s1, s2, hash)
+	indexPath := filepath.Join(path, indexFileName)
+	return &mbox{
+		RWMutex:   fs.hashLock.Get(hash),
+		store:     fs,
+		dirName:   hash,
+		path:      path,
+		indexPath: indexPath,
+	}
+}
+
+// generatePrefix converts a Time object into the ISO style format we use
+// as a prefix for message files.  Note:  It is used directly by unit
+// tests.
+func generatePrefix(date time.Time) string {
+	return date.Format("20060102T150405")
+}
+
+// generateId adds a 4-digit unique number onto the end of the string
+// returned by generatePrefix()
+func generateID(date time.Time) string {
+	return generatePrefix(date) + "-" + fmt.Sprintf("%04d", <-countChannel)
+}

pkg/storage/file/fstore_test.go

@@ -0,0 +1,257 @@
+package file
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/mail"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/test"
+	"github.com/stretchr/testify/assert"
+)
+
+// TestSuite runs storage package test suite on file store.
+func TestSuite(t *testing.T) {
+	test.StoreSuite(t, func(conf config.Storage) (storage.Store, func(), error) {
+		ds, _ := setupDataStore(conf)
+		destroy := func() {
+			teardownDataStore(ds)
+		}
+		return ds, destroy, nil
+	})
+}
+
+// Test directory structure created by filestore
+func TestFSDirStructure(t *testing.T) {
+	ds, logbuf := setupDataStore(config.Storage{})
+	defer teardownDataStore(ds)
+	root := ds.path
+
+	// james hashes to 474ba67bdb289c6263b36dfd8a7bed6c85b04943
+	mbName := "james"
+
+	// Check filestore root exists
+	assert.True(t, isDir(root), "Expected %q to be a directory", root)
+
+	// Check mail dir exists
+	expect := filepath.Join(root, "mail")
+	assert.True(t, isDir(expect), "Expected %q to be a directory", expect)
+
+	// Check first hash section does not exist
+	expect = filepath.Join(root, "mail", "474")
+	assert.False(t, isDir(expect), "Expected %q to not exist", expect)
+
+	// Deliver test message
+	id1, _ := deliverMessage(ds, mbName, "test", time.Now())
+
+	// Check path to message exists
+	assert.True(t, isDir(expect), "Expected %q to be a directory", expect)
+	expect = filepath.Join(expect, "474ba6")
+	assert.True(t, isDir(expect), "Expected %q to be a directory", expect)
+	expect = filepath.Join(expect, "474ba67bdb289c6263b36dfd8a7bed6c85b04943")
+	assert.True(t, isDir(expect), "Expected %q to be a directory", expect)
+
+	// Check files
+	mbPath := expect
+	expect = filepath.Join(mbPath, "index.gob")
+	assert.True(t, isFile(expect), "Expected %q to be a file", expect)
+	expect = filepath.Join(mbPath, id1+".raw")
+	assert.True(t, isFile(expect), "Expected %q to be a file", expect)
+
+	// Deliver second test message
+	id2, _ := deliverMessage(ds, mbName, "test 2", time.Now())
+
+	// Check files
+	expect = filepath.Join(mbPath, "index.gob")
+	assert.True(t, isFile(expect), "Expected %q to be a file", expect)
+	expect = filepath.Join(mbPath, id2+".raw")
+	assert.True(t, isFile(expect), "Expected %q to be a file", expect)
+
+	// Delete message
+	err := ds.RemoveMessage(mbName, id1)
+	assert.Nil(t, err)
+
+	// Message should be removed
+	expect = filepath.Join(mbPath, id1+".raw")
+	assert.False(t, isPresent(expect), "Did not expect %q to exist", expect)
+	expect = filepath.Join(mbPath, "index.gob")
+	assert.True(t, isFile(expect), "Expected %q to be a file", expect)
+
+	// Delete message
+	err = ds.RemoveMessage(mbName, id2)
+	assert.Nil(t, err)
+
+	// Message should be removed
+	expect = filepath.Join(mbPath, id2+".raw")
+	assert.False(t, isPresent(expect), "Did not expect %q to exist", expect)
+
+	// No messages, index & maildir should be removed
+	expect = filepath.Join(mbPath, "index.gob")
+	assert.False(t, isPresent(expect), "Did not expect %q to exist", expect)
+	expect = mbPath
+	assert.False(t, isPresent(expect), "Did not expect %q to exist", expect)
+
+	if t.Failed() {
+		// Wait for handler to finish logging
+		time.Sleep(2 * time.Second)
+		// Dump buffered log data if there was a failure
+		_, _ = io.Copy(os.Stderr, logbuf)
+	}
+}
+
+// Test missing files
+func TestFSMissing(t *testing.T) {
+	ds, logbuf := setupDataStore(config.Storage{})
+	defer teardownDataStore(ds)
+
+	mbName := "fred"
+	subjects := []string{"a", "b", "c"}
+	sentIds := make([]string, len(subjects))
+
+	for i, subj := range subjects {
+		// Add a message
+		id, _ := deliverMessage(ds, mbName, subj, time.Now())
+		sentIds[i] = id
+	}
+
+	// Delete a message file without removing it from index
+	msg, err := ds.GetMessage(mbName, sentIds[1])
+	assert.Nil(t, err)
+	fmsg := msg.(*Message)
+	_ = os.Remove(fmsg.rawPath())
+	msg, err = ds.GetMessage(mbName, sentIds[1])
+	assert.Nil(t, err)
+
+	// Try to read parts of message
+	_, err = msg.Source()
+	assert.Error(t, err)
+
+	if t.Failed() {
+		// Wait for handler to finish logging
+		time.Sleep(2 * time.Second)
+		// Dump buffered log data if there was a failure
+		_, _ = io.Copy(os.Stderr, logbuf)
+	}
+}
+
+// Test Get the latest message
+func TestGetLatestMessage(t *testing.T) {
+	ds, logbuf := setupDataStore(config.Storage{})
+	defer teardownDataStore(ds)
+
+	// james hashes to 474ba67bdb289c6263b36dfd8a7bed6c85b04943
+	mbName := "james"
+
+	// Test empty mailbox
+	msg, err := ds.GetMessage(mbName, "latest")
+	assert.Nil(t, msg)
+	assert.Error(t, err)
+
+	// Deliver test message
+	deliverMessage(ds, mbName, "test", time.Now())
+
+	// Deliver test message 2
+	id2, _ := deliverMessage(ds, mbName, "test 2", time.Now())
+
+	// Test get the latest message
+	msg, err = ds.GetMessage(mbName, "latest")
+	assert.Nil(t, err)
+	assert.True(t, msg.ID() == id2, "Expected %q to be equal to %q", msg.ID(), id2)
+
+	// Deliver test message 3
+	id3, _ := deliverMessage(ds, mbName, "test 3", time.Now())
+
+	msg, err = ds.GetMessage(mbName, "latest")
+	assert.Nil(t, err)
+	assert.True(t, msg.ID() == id3, "Expected %q to be equal to %q", msg.ID(), id3)
+
+	// Test wrong id
+	_, err = ds.GetMessage(mbName, "wrongid")
+	assert.Error(t, err)
+
+	if t.Failed() {
+		// Wait for handler to finish logging
+		time.Sleep(2 * time.Second)
+		// Dump buffered log data if there was a failure
+		_, _ = io.Copy(os.Stderr, logbuf)
+	}
+}
+
+// setupDataStore creates a new FileDataStore in a temporary directory
+func setupDataStore(cfg config.Storage) (*Store, *bytes.Buffer) {
+	path, err := ioutil.TempDir("", "inbucket")
+	if err != nil {
+		panic(err)
+	}
+	// Capture log output.
+	buf := new(bytes.Buffer)
+	log.SetOutput(buf)
+	if cfg.Params == nil {
+		cfg.Params = make(map[string]string)
+	}
+	cfg.Params["path"] = path
+	s, err := New(cfg)
+	if err != nil {
+		panic(err)
+	}
+	return s.(*Store), buf
+}
+
+// deliverMessage creates and delivers a message to the specific mailbox, returning
+// the size of the generated message.
+func deliverMessage(ds *Store, mbName string, subject string, date time.Time) (string, int64) {
+	// Build message for delivery
+	meta := message.Metadata{
+		Mailbox: mbName,
+		To:      []*mail.Address{{Name: "", Address: "somebody@host"}},
+		From:    &mail.Address{Name: "", Address: "somebodyelse@host"},
+		Subject: subject,
+		Date:    date,
+	}
+	testMsg := fmt.Sprintf("To: %s\r\nFrom: %s\r\nSubject: %s\r\n\r\nTest Body\r\n",
+		meta.To[0].Address, meta.From.Address, subject)
+	delivery := &message.Delivery{
+		Meta:   meta,
+		Reader: ioutil.NopCloser(strings.NewReader(testMsg)),
+	}
+	id, err := ds.AddMessage(delivery)
+	if err != nil {
+		panic(err)
+	}
+	return id, int64(len(testMsg))
+}
+
+func teardownDataStore(ds *Store) {
+	if err := os.RemoveAll(ds.path); err != nil {
+		panic(err)
+	}
+}
+
+func isPresent(path string) bool {
+	_, err := os.Lstat(path)
+	return err == nil
+}
+
+func isFile(path string) bool {
+	if fi, err := os.Lstat(path); err == nil {
+		return !fi.IsDir()
+	}
+	return false
+}
+
+func isDir(path string) bool {
+	if fi, err := os.Lstat(path); err == nil {
+		return fi.IsDir()
+	}
+	return false
+}

pkg/storage/file/mbox.go

@@ -0,0 +1,237 @@
+package file
+
+import (
+	"bufio"
+	"encoding/gob"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sync"
+
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/rs/zerolog/log"
+)
+
+// mbox manages the mail for a specific user and correlates to a particular directory on disk.
+// mbox methods are not thread safe, mbox.RWMutex must be held prior to calling.
+type mbox struct {
+	*sync.RWMutex
+	store       *Store
+	name        string
+	dirName     string
+	path        string
+	indexLoaded bool
+	indexPath   string
+	messages    []*Message
+}
+
+// getMessages scans the mailbox directory for .gob files and decodes them into
+// a slice of Message objects.
+func (mb *mbox) getMessages() ([]storage.Message, error) {
+	if !mb.indexLoaded {
+		if err := mb.readIndex(); err != nil {
+			return nil, err
+		}
+	}
+	messages := make([]storage.Message, len(mb.messages))
+	for i, m := range mb.messages {
+		messages[i] = m
+	}
+	return messages, nil
+}
+
+// getMessage decodes a single message by ID and returns a Message object.
+func (mb *mbox) getMessage(id string) (storage.Message, error) {
+	if !mb.indexLoaded {
+		if err := mb.readIndex(); err != nil {
+			return nil, err
+		}
+	}
+	if id == "latest" && len(mb.messages) != 0 {
+		return mb.messages[len(mb.messages)-1], nil
+	}
+	for _, m := range mb.messages {
+		if m.Fid == id {
+			return m, nil
+		}
+	}
+	return nil, storage.ErrNotExist
+}
+
+// removeMessage deletes the message off disk and removes it from the index.
+func (mb *mbox) removeMessage(id string) error {
+	if !mb.indexLoaded {
+		if err := mb.readIndex(); err != nil {
+			return err
+		}
+	}
+	var msg *Message
+	for i, m := range mb.messages {
+		if id == m.ID() {
+			msg = m
+			// Slice around message we are deleting
+			mb.messages = append(mb.messages[:i], mb.messages[i+1:]...)
+			break
+		}
+	}
+	if msg == nil {
+		return storage.ErrNotExist
+	}
+	if err := mb.writeIndex(); err != nil {
+		return err
+	}
+	if len(mb.messages) == 0 {
+		// This was the last message, thus writeIndex() has removed the entire
+		// directory; we don't need to delete the raw file.
+		return nil
+	}
+	// There are still messages in the index
+	log.Debug().Str("module", "storage").Str("path", msg.rawPath()).Msg("Deleting file")
+	return os.Remove(msg.rawPath())
+}
+
+// purge deletes all messages in this mailbox.
+func (mb *mbox) purge() error {
+	mb.messages = mb.messages[:0]
+	return mb.writeIndex()
+}
+
+// readIndex loads the mailbox index data from disk
+func (mb *mbox) readIndex() error {
+	// Clear message slice, open index
+	mb.messages = mb.messages[:0]
+	// Check if index exists
+	if _, err := os.Stat(mb.indexPath); err != nil {
+		// Does not exist, but that's not an error in our world
+		log.Debug().Str("module", "storage").Str("path", mb.indexPath).
+			Msg("Index does not yet exist")
+		mb.indexLoaded = true
+		return nil
+	}
+	file, err := os.Open(mb.indexPath)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err := file.Close(); err != nil {
+			log.Error().Str("module", "storage").Str("path", mb.indexPath).Err(err).
+				Msg("Failed to close")
+		}
+	}()
+	// Decode gob data
+	dec := gob.NewDecoder(bufio.NewReader(file))
+	name := ""
+	if err = dec.Decode(&name); err != nil {
+		return fmt.Errorf("Corrupt mailbox %q: %v", mb.indexPath, err)
+	}
+	mb.name = name
+	for {
+		// Load messages until EOF
+		msg := &Message{}
+		if err = dec.Decode(msg); err != nil {
+			if err == io.EOF {
+				break
+			}
+			return fmt.Errorf("Corrupt mailbox %q: %v", mb.indexPath, err)
+		}
+		msg.mailbox = mb
+		mb.messages = append(mb.messages, msg)
+	}
+	mb.indexLoaded = true
+	return nil
+}
+
+// writeIndex overwrites the index on disk with the current mailbox data
+func (mb *mbox) writeIndex() error {
+	// Lock for writing
+	if len(mb.messages) > 0 {
+		// Ensure mailbox directory exists
+		if err := mb.createDir(); err != nil {
+			return err
+		}
+		// Open index for writing
+		file, err := os.Create(mb.indexPath)
+		if err != nil {
+			return err
+		}
+		writer := bufio.NewWriter(file)
+		// Write each message and then flush
+		enc := gob.NewEncoder(writer)
+		if err = enc.Encode(mb.name); err != nil {
+			_ = file.Close()
+			return err
+		}
+		for _, m := range mb.messages {
+			if err = enc.Encode(m); err != nil {
+				_ = file.Close()
+				return err
+			}
+		}
+		if err := writer.Flush(); err != nil {
+			_ = file.Close()
+			return err
+		}
+		if err := file.Close(); err != nil {
+			log.Error().Str("module", "storage").Str("path", mb.indexPath).Err(err).
+				Msg("Failed to close")
+			return err
+		}
+	} else {
+		// No messages, delete index+maildir
+		log.Debug().Str("module", "storage").Str("path", mb.path).Msg("Removing mailbox")
+		return mb.removeDir()
+	}
+	return nil
+}
+
+// createDir checks for the presence of the path for this mailbox, creates it if needed
+func (mb *mbox) createDir() error {
+	if _, err := os.Stat(mb.path); err != nil {
+		if err := os.MkdirAll(mb.path, 0770); err != nil {
+			log.Error().Str("module", "storage").Str("path", mb.path).Err(err).
+				Msg("Failed to create directory")
+			return err
+		}
+	}
+	return nil
+}
+
+// removeDir removes the mailbox, plus empty higher level directories
+func (mb *mbox) removeDir() error {
+	// remove mailbox dir, including index file
+	if err := os.RemoveAll(mb.path); err != nil {
+		return err
+	}
+	// remove parents if empty
+	dir := filepath.Dir(mb.path)
+	if removeDirIfEmpty(dir) {
+		removeDirIfEmpty(filepath.Dir(dir))
+	}
+	return nil
+}
+
+// removeDirIfEmpty will remove the specified directory if it contains no files or directories.
+// Returns true if dir was removed.
+func removeDirIfEmpty(path string) (removed bool) {
+	f, err := os.Open(path)
+	if err != nil {
+		return false
+	}
+	files, err := f.Readdirnames(0)
+	_ = f.Close()
+	if err != nil {
+		return false
+	}
+	if len(files) > 0 {
+		// Dir not empty
+		return false
+	}
+	log.Debug().Str("module", "storage").Str("path", path).Msg("Removing dir")
+	err = os.Remove(path)
+	if err != nil {
+		log.Error().Str("module", "storage").Str("path", path).Err(err).Msg("Failed to remove")
+		return false
+	}
+	return true
+}

pkg/storage/lock.go

@@ -0,0 +1,23 @@
+package storage
+
+import (
+	"strconv"
+	"sync"
+)
+
+// HashLock holds a fixed length array of mutexes.  This approach allows concurrent mailbox
+// access in most cases without requiring an infinite number of mutexes.
+type HashLock [4096]sync.RWMutex
+
+// Get returns a RWMutex based on the first 12 bits of the mailbox hash.  Hash must be a hexidecimal
+// string of three or more characters.
+func (h *HashLock) Get(hash string) *sync.RWMutex {
+	if len(hash) < 3 {
+		return nil
+	}
+	i, err := strconv.ParseInt(hash[0:3], 16, 0)
+	if err != nil {
+		return nil
+	}
+	return &h[i]
+}

pkg/storage/lock_test.go

@@ -0,0 +1,61 @@
+package storage_test
+
+import (
+	"testing"
+
+	"github.com/jhillyerd/inbucket/pkg/storage"
+)
+
+func TestHashLock(t *testing.T) {
+	hl := &storage.HashLock{}
+
+	// Invalid hashes
+	testCases := []struct {
+		name, input string
+	}{
+		{"empty", ""},
+		{"short", "a0"},
+		{"badhex", "zzzzzzzzzzzzzzzzzzzzzzz"},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.input, func(t *testing.T) {
+			l := hl.Get(tc.input)
+			if l != nil {
+				t.Errorf("Expected nil lock for %s %q, got %v", tc.name, tc.input, l)
+			}
+		})
+	}
+
+	// Valid hashes
+	testStrings := []string{
+		"deadbeef",
+		"00000000",
+		"ffffffff",
+	}
+	for _, ts := range testStrings {
+		t.Run(ts, func(t *testing.T) {
+			l := hl.Get(ts)
+			if l == nil {
+				t.Errorf("Expeced non-nil lock for hex string %q", ts)
+			}
+		})
+	}
+
+	a := hl.Get("deadbeef")
+	b := hl.Get("deadbeef")
+	if a != b {
+		t.Errorf("Expected identical locks for identical hashes, got: %p != %p", a, b)
+	}
+
+	a = hl.Get("deadbeef")
+	b = hl.Get("d3adb33f")
+	if a == b {
+		t.Errorf("Expected different locks for different hashes, got: %p == %p", a, b)
+	}
+
+	a = hl.Get("deadbeef")
+	b = hl.Get("deadb33f")
+	if a != b {
+		t.Errorf("Expected identical locks for identical leading hashes, got: %p != %p", a, b)
+	}
+}

pkg/storage/mem/maxsize.go

@@ -0,0 +1,73 @@
+package mem
+
+import "container/list"
+
+type msgDone struct {
+	msg  *Message
+	done chan struct{}
+}
+
+// maxSizeEnforcer will delete the oldest message until the entire mail store is equal to or less
+// than maxSize bytes.
+func (s *Store) maxSizeEnforcer(maxSize int64) {
+	all := &list.List{}
+	curSize := int64(0)
+	for {
+		select {
+		case md, ok := <-s.incoming:
+			if !ok {
+				return
+			}
+			// Add message to all.
+			m := md.msg
+			el := all.PushBack(m)
+			m.el = el
+			curSize += int64(m.Size())
+			for curSize > maxSize {
+				// Remove oldest message.
+				el := all.Front()
+				all.Remove(el)
+				m := el.Value.(*Message)
+				if s.removeMessage(m.mailbox, m.id) != nil {
+					curSize -= int64(m.Size())
+				}
+			}
+			close(md.done)
+		case md, ok := <-s.remove:
+			if !ok {
+				return
+			}
+			// Remove message from all.
+			m := md.msg
+			el := all.Remove(m.el)
+			if el != nil {
+				curSize -= int64(m.Size())
+			}
+			close(md.done)
+		}
+	}
+}
+
+// enforcerDeliver sends delivery to enforcer if configured, and waits for completion.
+func (s *Store) enforcerDeliver(m *Message) {
+	if s.incoming != nil {
+		md := &msgDone{
+			msg:  m,
+			done: make(chan struct{}),
+		}
+		s.incoming <- md
+		<-md.done
+	}
+}
+
+// enforcerRemove sends removal to enforcer if configured, and waits for completion.
+func (s *Store) enforcerRemove(m *Message) {
+	if s.remove != nil {
+		md := &msgDone{
+			msg:  m,
+			done: make(chan struct{}),
+		}
+		s.remove <- md
+		<-md.done
+	}
+}

pkg/storage/mem/message.go

@@ -0,0 +1,57 @@
+package mem
+
+import (
+	"bytes"
+	"container/list"
+	"io"
+	"io/ioutil"
+	"net/mail"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/storage"
+)
+
+// Message is a memory store message.
+type Message struct {
+	index   int
+	mailbox string
+	id      string
+	from    *mail.Address
+	to      []*mail.Address
+	date    time.Time
+	subject string
+	source  []byte
+	seen    bool
+	el      *list.Element // This message in Store.messages
+}
+
+var _ storage.Message = &Message{}
+
+// Mailbox returns the mailbox name.
+func (m *Message) Mailbox() string { return m.mailbox }
+
+// ID the message ID.
+func (m *Message) ID() string { return m.id }
+
+// From returns the from address.
+func (m *Message) From() *mail.Address { return m.from }
+
+// To returns the to address list.
+func (m *Message) To() []*mail.Address { return m.to }
+
+// Date returns the date received.
+func (m *Message) Date() time.Time { return m.date }
+
+// Subject returns the subject line.
+func (m *Message) Subject() string { return m.subject }
+
+// Source returns a reader for the message source.
+func (m *Message) Source() (io.ReadCloser, error) {
+	return ioutil.NopCloser(bytes.NewReader(m.source)), nil
+}
+
+// Size returns the message size in bytes.
+func (m *Message) Size() int64 { return int64(len(m.source)) }
+
+// Seen returns the message seen flag.
+func (m *Message) Seen() bool { return m.seen }

pkg/storage/mem/store.go

@@ -0,0 +1,212 @@
+package mem
+
+import (
+	"fmt"
+	"io/ioutil"
+	"sort"
+	"strconv"
+	"sync"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+)
+
+// Store implements an in-memory message store.
+type Store struct {
+	sync.Mutex
+	boxes    map[string]*mbox
+	cap      int           // Per-mailbox message cap.
+	incoming chan *msgDone // New messages for size enforcer.
+	remove   chan *msgDone // Remove deleted messages from size enforcer.
+}
+
+type mbox struct {
+	sync.RWMutex
+	name     string
+	last     int
+	first    int
+	messages map[string]*Message
+}
+
+var _ storage.Store = &Store{}
+
+// New returns an emtpy memory store.
+func New(cfg config.Storage) (storage.Store, error) {
+	s := &Store{
+		boxes: make(map[string]*mbox),
+		cap:   cfg.MailboxMsgCap,
+	}
+	if str, ok := cfg.Params["maxkb"]; ok {
+		maxKB, err := strconv.ParseInt(str, 10, 64)
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse maxkb: %v", err)
+		}
+		if maxKB > 0 {
+			// Setup enforcer.
+			s.incoming = make(chan *msgDone)
+			s.remove = make(chan *msgDone)
+			go s.maxSizeEnforcer(maxKB * 1024)
+		}
+	}
+	return s, nil
+}
+
+// AddMessage stores the message, message ID and Size will be ignored.
+func (s *Store) AddMessage(message storage.Message) (id string, err error) {
+	r, ierr := message.Source()
+	if ierr != nil {
+		err = ierr
+		return
+	}
+	source, ierr := ioutil.ReadAll(r)
+	if ierr != nil {
+		err = ierr
+		return
+	}
+	m := &Message{
+		mailbox: message.Mailbox(),
+		from:    message.From(),
+		to:      message.To(),
+		date:    message.Date(),
+		subject: message.Subject(),
+	}
+	s.withMailbox(message.Mailbox(), true, func(mb *mbox) {
+		// Generate message ID.
+		mb.last++
+		m.index = mb.last
+		id = strconv.Itoa(mb.last)
+		m.id = id
+		m.source = source
+		mb.messages[id] = m
+		if s.cap > 0 {
+			// Enforce cap.
+			for len(mb.messages) > s.cap {
+				delete(mb.messages, strconv.Itoa(mb.first))
+				mb.first++
+			}
+		}
+	})
+	s.enforcerDeliver(m)
+	return id, err
+}
+
+// GetMessage gets a mesage.
+func (s *Store) GetMessage(mailbox, id string) (m storage.Message, err error) {
+	s.withMailbox(mailbox, false, func(mb *mbox) {
+		var ok bool
+		m, ok = mb.messages[id]
+		if !ok {
+			m = nil
+		}
+	})
+	return m, err
+}
+
+// GetMessages gets a list of messages.
+func (s *Store) GetMessages(mailbox string) (ms []storage.Message, err error) {
+	s.withMailbox(mailbox, false, func(mb *mbox) {
+		ms = make([]storage.Message, 0, len(mb.messages))
+		for _, v := range mb.messages {
+			ms = append(ms, v)
+		}
+		sort.Slice(ms, func(i, j int) bool {
+			return ms[i].(*Message).index < ms[j].(*Message).index
+		})
+	})
+	return ms, err
+}
+
+// MarkSeen marks a message as having been read.
+func (s *Store) MarkSeen(mailbox, id string) error {
+	s.withMailbox(mailbox, true, func(mb *mbox) {
+		m := mb.messages[id]
+		if m != nil {
+			m.seen = true
+		}
+	})
+	return nil
+}
+
+// PurgeMessages deletes the contents of a mailbox.
+func (s *Store) PurgeMessages(mailbox string) error {
+	var messages map[string]*Message
+	s.withMailbox(mailbox, true, func(mb *mbox) {
+		messages = mb.messages
+		mb.messages = make(map[string]*Message)
+	})
+	if len(messages) > 0 && s.remove != nil {
+		for _, m := range messages {
+			s.enforcerRemove(m)
+		}
+	}
+	return nil
+}
+
+// removeMessage deletes a single message without notifying the size enforcer.  Returns the message
+// that was removed.
+func (s *Store) removeMessage(mailbox, id string) *Message {
+	var m *Message
+	s.withMailbox(mailbox, true, func(mb *mbox) {
+		m = mb.messages[id]
+		if m != nil {
+			delete(mb.messages, id)
+		}
+	})
+	return m
+}
+
+// RemoveMessage deletes a single message.
+func (s *Store) RemoveMessage(mailbox, id string) error {
+	m := s.removeMessage(mailbox, id)
+	if m != nil {
+		s.enforcerRemove(m)
+	}
+	return nil
+}
+
+// VisitMailboxes visits each mailbox in the store.
+func (s *Store) VisitMailboxes(f func([]storage.Message) (cont bool)) error {
+	// Lock store, get names of all mailboxes.
+	s.Lock()
+	boxNames := make([]string, 0, len(s.boxes))
+	for k := range s.boxes {
+		boxNames = append(boxNames, k)
+	}
+	s.Unlock()
+	// Process mailboxes.
+	for _, mailbox := range boxNames {
+		ms, _ := s.GetMessages(mailbox)
+		if !f(ms) {
+			break
+		}
+	}
+	return nil
+}
+
+// withMailbox gets or creates a mailbox, locks it, then calls f.
+func (s *Store) withMailbox(mailbox string, writeLock bool, f func(mb *mbox)) {
+	s.Lock()
+	mb, ok := s.boxes[mailbox]
+	if !ok {
+		// Create mailbox
+		mb = &mbox{
+			name:     mailbox,
+			messages: make(map[string]*Message),
+		}
+		s.boxes[mailbox] = mb
+	}
+	s.Unlock()
+	if writeLock {
+		mb.Lock()
+	} else {
+		mb.RLock()
+	}
+	defer func() {
+		if writeLock {
+			mb.Unlock()
+		} else {
+			mb.RUnlock()
+		}
+	}()
+	f(mb)
+}

pkg/storage/mem/store_test.go

@@ -0,0 +1,82 @@
+package mem
+
+import (
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/test"
+)
+
+// TestSuite runs storage package test suite on file store.
+func TestSuite(t *testing.T) {
+	test.StoreSuite(t, func(conf config.Storage) (storage.Store, func(), error) {
+		s, _ := New(conf)
+		destroy := func() {}
+		return s, destroy, nil
+	})
+}
+
+// TestMessageList verifies the operation of the global message list: mem.Store.messages.
+func TestMaxSize(t *testing.T) {
+	maxSize := int64(2048)
+	s, _ := New(config.Storage{Params: map[string]string{"maxkb": "2"}})
+	boxes := []string{"alpha", "beta", "whiskey", "tango", "foxtrot"}
+	n := 10
+	// total := 50
+	sizeChan := make(chan int64, len(boxes))
+	// Populate mailboxes concurrently.
+	for _, mailbox := range boxes {
+		go func(mailbox string) {
+			size := int64(0)
+			for i := 0; i < n; i++ {
+				_, nbytes := test.DeliverToStore(t, s, mailbox, "subject", time.Now())
+				size += nbytes
+			}
+			sizeChan <- size
+		}(mailbox)
+	}
+	// Wait for sizes.
+	sentBytesTotal := int64(0)
+	for range boxes {
+		sentBytesTotal += <-sizeChan
+	}
+	// Calculate actual size.
+	gotSize := int64(0)
+	s.VisitMailboxes(func(messages []storage.Message) bool {
+		for _, m := range messages {
+			gotSize += m.Size()
+		}
+		return true
+	})
+	// Verify state. Messages are ~75 bytes each.
+	if gotSize < 2048-75 {
+		t.Errorf("Got total size %v, want greater than: %v", gotSize, 2048-75)
+	}
+	if gotSize > maxSize {
+		t.Errorf("Got total size %v, want less than: %v", gotSize, maxSize)
+	}
+	// Purge all messages concurrently, testing for deadlocks.
+	wg := &sync.WaitGroup{}
+	wg.Add(len(boxes))
+	for _, mailbox := range boxes {
+		go func(mailbox string) {
+			err := s.PurgeMessages(mailbox)
+			if err != nil {
+				t.Fatal(err)
+			}
+			wg.Done()
+		}(mailbox)
+	}
+	wg.Wait()
+	count := 0
+	s.VisitMailboxes(func(messages []storage.Message) bool {
+		count += len(messages)
+		return true
+	})
+	if count != 0 {
+		t.Errorf("Got %v total messages, want: %v", count, 0)
+	}
+}

pkg/storage/retention.go

@@ -1,4 +1,4 @@
-package smtpd
+package storage
 
 import (
 	"container/list"
@@ -6,8 +6,9 @@ import (
 	"sync"
 	"time"
 
-	"github.com/jhillyerd/inbucket/config"
-	"github.com/jhillyerd/inbucket/log"
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/metric"
+	"github.com/rs/zerolog/log"
 )
 
 var (
@@ -18,14 +19,17 @@ var (
 	expRetentionDeletesTotal = new(expvar.Int)
 	expRetentionPeriod       = new(expvar.Int)
 	expRetainedCurrent       = new(expvar.Int)
+	expRetainedSize          = new(expvar.Int)
 
 	// History of certain stats
 	retentionDeletesHist = list.New()
 	retainedHist         = list.New()
+	sizeHist             = list.New()
 
 	// History rendered as comma delimited string
 	expRetentionDeletesHist = new(expvar.String)
 	expRetainedHist         = new(expvar.String)
+	expSizeHist             = new(expvar.String)
 )
 
 func init() {
@@ -36,46 +40,58 @@ func init() {
 	rm.Set("Period", expRetentionPeriod)
 	rm.Set("RetainedHist", expRetainedHist)
 	rm.Set("RetainedCurrent", expRetainedCurrent)
+	rm.Set("RetainedSize", expRetainedSize)
+	rm.Set("SizeHist", expSizeHist)
+
+	metric.AddTickerFunc(func() {
+		expRetentionDeletesHist.Set(metric.Push(retentionDeletesHist, expRetentionDeletesTotal))
+		expRetainedHist.Set(metric.Push(retainedHist, expRetainedCurrent))
+		expSizeHist.Set(metric.Push(sizeHist, expRetainedSize))
+	})
 }
 
 // RetentionScanner looks for messages older than the configured retention period and deletes them.
 type RetentionScanner struct {
 	globalShutdown    chan bool // Closes when Inbucket needs to shut down
 	retentionShutdown chan bool // Closed after the scanner has shut down
-	ds                DataStore
+	ds                Store
 	retentionPeriod   time.Duration
 	retentionSleep    time.Duration
 }
 
-// NewRetentionScanner launches a go-routine that scans for expired
-// messages, following the configured interval
-func NewRetentionScanner(ds DataStore, shutdownChannel chan bool) *RetentionScanner {
-	cfg := config.GetDataStoreConfig()
+// NewRetentionScanner configures a new RententionScanner.
+func NewRetentionScanner(
+	cfg config.Storage,
+	ds Store,
+	shutdownChannel chan bool,
+) *RetentionScanner {
 	rs := &RetentionScanner{
 		globalShutdown:    shutdownChannel,
 		retentionShutdown: make(chan bool),
 		ds:                ds,
-		retentionPeriod:   time.Duration(cfg.RetentionMinutes) * time.Minute,
-		retentionSleep:    time.Duration(cfg.RetentionSleep) * time.Millisecond,
+		retentionPeriod:   cfg.RetentionPeriod,
+		retentionSleep:    cfg.RetentionSleep,
 	}
 	// expRetentionPeriod is displayed on the status page
-	expRetentionPeriod.Set(int64(cfg.RetentionMinutes * 60))
+	expRetentionPeriod.Set(int64(cfg.RetentionPeriod / time.Second))
 	return rs
 }
 
 // Start up the retention scanner if retention period > 0
 func (rs *RetentionScanner) Start() {
 	if rs.retentionPeriod <= 0 {
-		log.Infof("Retention scanner disabled")
+		log.Info().Str("phase", "startup").Str("module", "storage").Msg("Retention scanner disabled")
 		close(rs.retentionShutdown)
 		return
 	}
-	log.Infof("Retention configured for %v", rs.retentionPeriod)
+	log.Info().Str("phase", "startup").Str("module", "storage").
+		Msgf("Retention configured for %v", rs.retentionPeriod)
 	go rs.run()
 }
 
 // run loops to kick off the scanner on the correct schedule
 func (rs *RetentionScanner) run() {
+	slog := log.With().Str("module", "storage").Logger()
 	start := time.Now()
 retentionLoop:
 	for {
@@ -83,80 +99,76 @@ retentionLoop:
 		since := time.Since(start)
 		if since < time.Minute {
 			dur := time.Minute - since
-			log.Tracef("Retention scanner sleeping for %v", dur)
+			slog.Debug().Msgf("Retention scanner sleeping for %v", dur)
 			select {
-			case _ = <-rs.globalShutdown:
+			case <-rs.globalShutdown:
 				break retentionLoop
-			case _ = <-time.After(dur):
+			case <-time.After(dur):
 			}
 		}
 		// Kickoff scan
 		start = time.Now()
-		if err := rs.doScan(); err != nil {
-			log.Errorf("Error during retention scan: %v", err)
+		if err := rs.DoScan(); err != nil {
+			slog.Error().Err(err).Msg("Error during retention scan")
 		}
 		// Check for global shutdown
 		select {
-		case _ = <-rs.globalShutdown:
+		case <-rs.globalShutdown:
 			break retentionLoop
 		default:
 		}
 	}
-	log.Tracef("Retention scanner shut down")
+	slog.Debug().Str("phase", "shutdown").Msg("Retention scanner shut down")
 	close(rs.retentionShutdown)
 }
 
-// doScan does a single pass of all mailboxes looking for messages that can be purged
-func (rs *RetentionScanner) doScan() error {
-	log.Tracef("Starting retention scan")
+// DoScan does a single pass of all mailboxes looking for messages that can be purged.
+func (rs *RetentionScanner) DoScan() error {
+	slog := log.With().Str("module", "storage").Logger()
+	slog.Debug().Msg("Starting retention scan")
 	cutoff := time.Now().Add(-1 * rs.retentionPeriod)
-	mboxes, err := rs.ds.AllMailboxes()
-	if err != nil {
-		return err
-	}
 	retained := 0
-	// Loop over all mailboxes
-	for _, mb := range mboxes {
-		messages, err := mb.GetMessages()
-		if err != nil {
-			return err
-		}
-		// Loop over all messages in mailbox
+	storeSize := int64(0)
+	// Loop over all mailboxes.
+	err := rs.ds.VisitMailboxes(func(messages []Message) bool {
 		for _, msg := range messages {
 			if msg.Date().Before(cutoff) {
-				log.Tracef("Purging expired message %v", msg.ID())
-				err = msg.Delete()
-				if err != nil {
-					// Log but don't abort
-					log.Errorf("Failed to purge message %v: %v", msg.ID(), err)
+				slog.Debug().Str("mailbox", msg.Mailbox()).
+					Msgf("Purging expired message %v", msg.ID())
+				if err := rs.ds.RemoveMessage(msg.Mailbox(), msg.ID()); err != nil {
+					slog.Error().Str("mailbox", msg.Mailbox()).Err(err).
+						Msgf("Failed to purge message %v", msg.ID())
 				} else {
 					expRetentionDeletesTotal.Add(1)
 				}
 			} else {
 				retained++
+				storeSize += msg.Size()
 			}
 		}
-		// Sleep after completing a mailbox
 		select {
 		case <-rs.globalShutdown:
-			log.Tracef("Retention scan aborted due to shutdown")
-			return nil
+			slog.Debug().Str("phase", "shutdown").Msg("Retention scan aborted due to shutdown")
+			return false
 		case <-time.After(rs.retentionSleep):
 			// Reduce disk thrashing
 		}
+		return true
+	})
+	if err != nil {
+		return err
 	}
 	// Update metrics
 	setRetentionScanCompleted(time.Now())
 	expRetainedCurrent.Set(int64(retained))
+	expRetainedSize.Set(storeSize)
 	return nil
 }
 
-// Join does not retun until the retention scanner has shut down
+// Join does not return until the retention scanner has shut down.
 func (rs *RetentionScanner) Join() {
 	if rs.retentionShutdown != nil {
-		select {
-		case <-rs.retentionShutdown:
-		}
+		<-rs.retentionShutdown
 	}
 }
 

pkg/storage/retention_test.go

@@ -0,0 +1,62 @@
+package storage_test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+	"github.com/jhillyerd/inbucket/pkg/test"
+)
+
+func TestDoRetentionScan(t *testing.T) {
+	ds := test.NewStore()
+	// Mockup some different aged messages (num is in hours)
+	new1 := stubMessage("mb1", 0)
+	new2 := stubMessage("mb2", 1)
+	new3 := stubMessage("mb3", 2)
+	old1 := stubMessage("mb1", 4)
+	old2 := stubMessage("mb1", 12)
+	old3 := stubMessage("mb2", 24)
+	ds.AddMessage(new1)
+	ds.AddMessage(old1)
+	ds.AddMessage(old2)
+	ds.AddMessage(old3)
+	ds.AddMessage(new2)
+	ds.AddMessage(new3)
+	// Test 4 hour retention
+	cfg := config.Storage{
+		RetentionPeriod: 239 * time.Minute,
+		RetentionSleep:  0,
+	}
+	shutdownChan := make(chan bool)
+	rs := storage.NewRetentionScanner(cfg, ds, shutdownChan)
+	if err := rs.DoScan(); err != nil {
+		t.Error(err)
+	}
+	// Delete should not have been called on new messages
+	for _, m := range []storage.Message{new1, new2, new3} {
+		if ds.MessageDeleted(m) {
+			t.Errorf("Expected %v to be present, was deleted", m.ID())
+		}
+	}
+	// Delete should have been called once on old messages
+	for _, m := range []storage.Message{old1, old2, old3} {
+		if !ds.MessageDeleted(m) {
+			t.Errorf("Expected %v to be deleted, was present", m.ID())
+		}
+	}
+}
+
+// stubMessage creates a message stub of a specific age
+func stubMessage(mailbox string, ageHours int) storage.Message {
+	return &message.Delivery{
+		Meta: message.Metadata{
+			Mailbox: mailbox,
+			ID:      fmt.Sprintf("MSG[age=%vh]", ageHours),
+			Date:    time.Now().Add(time.Duration(ageHours*-1) * time.Hour),
+		},
+	}
+}

pkg/storage/storage.go

@@ -0,0 +1,56 @@
+// Package storage contains implementation independent datastore logic
+package storage
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/mail"
+	"time"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+)
+
+var (
+	// ErrNotExist indicates the requested message does not exist.
+	ErrNotExist = errors.New("message does not exist")
+
+	// ErrNotWritable indicates the message is closed; no longer writable
+	ErrNotWritable = errors.New("Message not writable")
+
+	// Constructors tracks registered storage constructors
+	Constructors = make(map[string]func(config.Storage) (Store, error))
+)
+
+// Store is the interface Inbucket uses to interact with storage implementations.
+type Store interface {
+	// AddMessage stores the message, message ID and Size will be ignored.
+	AddMessage(message Message) (id string, err error)
+	GetMessage(mailbox, id string) (Message, error)
+	GetMessages(mailbox string) ([]Message, error)
+	MarkSeen(mailbox, id string) error
+	PurgeMessages(mailbox string) error
+	RemoveMessage(mailbox, id string) error
+	VisitMailboxes(f func([]Message) (cont bool)) error
+}
+
+// Message represents a message to be stored, or returned from a storage implementation.
+type Message interface {
+	Mailbox() string
+	ID() string
+	From() *mail.Address
+	To() []*mail.Address
+	Date() time.Time
+	Subject() string
+	Source() (io.ReadCloser, error)
+	Size() int64
+	Seen() bool
+}
+
+// FromConfig creates an instance of the Store based on the provided configuration.
+func FromConfig(c config.Storage) (store Store, err error) {
+	if cf := Constructors[c.Type]; cf != nil {
+		return cf(c)
+	}
+	return nil, fmt.Errorf("unknown storage type configured: %q", c.Type)
+}

pkg/stringutil/utils.go

@@ -0,0 +1,48 @@
+package stringutil
+
+import (
+	"crypto/sha1"
+	"fmt"
+	"io"
+	"net/mail"
+	"strings"
+)
+
+// HashMailboxName accepts a mailbox name and hashes it.  filestore uses this as
+// the directory to house the mailbox
+func HashMailboxName(mailbox string) string {
+	h := sha1.New()
+	if _, err := io.WriteString(h, mailbox); err != nil {
+		// This shouldn't ever happen
+		return ""
+	}
+	return fmt.Sprintf("%x", h.Sum(nil))
+}
+
+// StringAddressList converts a list of addresses to a list of strings
+func StringAddressList(addrs []*mail.Address) []string {
+	s := make([]string, len(addrs))
+	for i, a := range addrs {
+		if a != nil {
+			s[i] = a.String()
+		}
+	}
+	return s
+}
+
+// SliceContains returns true if s is present in slice.
+func SliceContains(slice []string, s string) bool {
+	for _, v := range slice {
+		if s == v {
+			return true
+		}
+	}
+	return false
+}
+
+// SliceToLower lowercases the contents of slice of strings.
+func SliceToLower(slice []string) {
+	for i, s := range slice {
+		slice[i] = strings.ToLower(s)
+	}
+}

pkg/stringutil/utils_test.go

@@ -0,0 +1,33 @@
+package stringutil_test
+
+import (
+	"net/mail"
+	"testing"
+
+	"github.com/jhillyerd/inbucket/pkg/stringutil"
+)
+
+func TestHashMailboxName(t *testing.T) {
+	want := "1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e"
+	got := stringutil.HashMailboxName("mail")
+	if got != want {
+		t.Errorf("Got %q, want %q", got, want)
+	}
+}
+
+func TestStringAddressList(t *testing.T) {
+	input := []*mail.Address{
+		{Name: "Fred B. Fish", Address: "fred@fish.org"},
+		{Name: "User", Address: "user@domain.org"},
+	}
+	want := []string{`"Fred B. Fish" <fred@fish.org>`, `"User" <user@domain.org>`}
+	output := stringutil.StringAddressList(input)
+	if len(output) != len(want) {
+		t.Fatalf("Got %v strings, want: %v", len(output), len(want))
+	}
+	for i, got := range output {
+		if got != want[i] {
+			t.Errorf("Got %q, want: %q", got, want[i])
+		}
+	}
+}

pkg/test/manager.go

@@ -0,0 +1,77 @@
+package test
+
+import (
+	"errors"
+
+	"github.com/jhillyerd/inbucket/pkg/config"
+	"github.com/jhillyerd/inbucket/pkg/message"
+	"github.com/jhillyerd/inbucket/pkg/policy"
+	"github.com/jhillyerd/inbucket/pkg/storage"
+)
+
+// ManagerStub is a test stub for message.Manager
+type ManagerStub struct {
+	message.Manager
+	mailboxes map[string][]*message.Message
+}
+
+// NewManager creates a new ManagerStub.
+func NewManager() *ManagerStub {
+	return &ManagerStub{
+		mailboxes: make(map[string][]*message.Message),
+	}
+}
+
+// AddMessage adds a message to the specified mailbox.
+func (m *ManagerStub) AddMessage(mailbox string, msg *message.Message) {
+	messages := m.mailboxes[mailbox]
+	m.mailboxes[mailbox] = append(messages, msg)
+}
+
+// GetMessage gets a message by ID from the specified mailbox.
+func (m *ManagerStub) GetMessage(mailbox, id string) (*message.Message, error) {
+	if mailbox == "messageerr" {
+		return nil, errors.New("internal error")
+	}
+	for _, msg := range m.mailboxes[mailbox] {
+		if msg.ID == id {
+			return msg, nil
+		}
+	}
+	return nil, storage.ErrNotExist
+}
+
+// GetMetadata gets all the metadata for the specified mailbox.
+func (m *ManagerStub) GetMetadata(mailbox string) ([]*message.Metadata, error) {
+	if mailbox == "messageserr" {
+		return nil, errors.New("internal error")
+	}
+	messages := m.mailboxes[mailbox]
+	metas := make([]*message.Metadata, len(messages))
+	for i, msg := range messages {
+		metas[i] = &msg.Metadata
+	}
+	return metas, nil
+}
+
+// MailboxForAddress invokes policy.ParseMailboxName.
+func (m *ManagerStub) MailboxForAddress(address string) (string, error) {
+	addrPolicy := &policy.Addressing{Config: &config.Root{
+		MailboxNaming: config.FullNaming,
+	}}
+	return addrPolicy.ExtractMailbox(address)
+}
+
+// MarkSeen marks a message as having been read.
+func (m *ManagerStub) MarkSeen(mailbox, id string) error {
+	if mailbox == "messageerr" {
+		return errors.New("internal error")
+	}
+	for _, msg := range m.mailboxes[mailbox] {
+		if msg.ID == id {
+			msg.Metadata.Seen = true
+			return nil
+		}
+	}
+	return storage.ErrNotExist
+}

pkg/test/storage.go

@@ -0,0 +1,88 @@
+package test
+
+import (
+	"errors"
+
+	"github.com/jhillyerd/inbucket/pkg/storage"
+)
+
+// StoreStub stubs storage.Store for testing.
+type StoreStub struct {
+	storage.Store
+	mailboxes map[string][]storage.Message
+	deleted   map[storage.Message]struct{}
+}
+
+// NewStore creates a new StoreStub.
+func NewStore() *StoreStub {
+	return &StoreStub{
+		mailboxes: make(map[string][]storage.Message),
+		deleted:   make(map[storage.Message]struct{}),
+	}
+}
+
+// AddMessage adds a message to the specified mailbox.
+func (s *StoreStub) AddMessage(m storage.Message) (id string, err error) {
+	mb := m.Mailbox()
+	msgs := s.mailboxes[mb]
+	s.mailboxes[mb] = append(msgs, m)
+	return m.ID(), nil
+}
+
+// GetMessage gets a message by ID from the specified mailbox.
+func (s *StoreStub) GetMessage(mailbox, id string) (storage.Message, error) {
+	if mailbox == "messageerr" {
+		return nil, errors.New("internal error")
+	}
+	for _, m := range s.mailboxes[mailbox] {
+		if m.ID() == id {
+			return m, nil
+		}
+	}
+	return nil, storage.ErrNotExist
+}
+
+// GetMessages gets all the messages for the specified mailbox.
+func (s *StoreStub) GetMessages(mailbox string) ([]storage.Message, error) {
+	if mailbox == "messageserr" {
+		return nil, errors.New("internal error")
+	}
+	return s.mailboxes[mailbox], nil
+}
+
+// RemoveMessage deletes a message by ID from the specified mailbox.
+func (s *StoreStub) RemoveMessage(mailbox, id string) error {
+	mb, ok := s.mailboxes[mailbox]
+	if ok {
+		var msg storage.Message
+		for i, m := range mb {
+			if m.ID() == id {
+				msg = m
+				s.mailboxes[mailbox] = append(mb[:i], mb[i+1:]...)
+				break
+			}
+		}
+		if msg != nil {
+			s.deleted[msg] = struct{}{}
+			return nil
+		}
+	}
+	return storage.ErrNotExist
+}
+
+// VisitMailboxes accepts a function that will be called with the messages in each mailbox while it
+// continues to return true.
+func (s *StoreStub) VisitMailboxes(f func([]storage.Message) (cont bool)) error {
+	for _, v := range s.mailboxes {
+		if !f(v) {
+			return nil
+		}
+	}
+	return nil
+}
+
+// MessageDeleted returns true if the specified message was deleted
+func (s *StoreStub) MessageDeleted(m storage.Message) bool {
+	_, ok := s.deleted[m]
+	return ok
+}