Begin work on message retention

- Refactor datastore such that we have a FileDataStore that implements
  the DataStore interface.
- Add in missing SMTP configuration options: max recips, max idle, max
  message size
- Add retention options to config

README.md

@@ -18,7 +18,7 @@ Screenshots
 *Viewing an email in Inbucket.*
 
 ![Metrics](http://cloud.github.com/downloads/jhillyerd/inbucket/inbucket-ss2.png)
-*Monitoring metrics while Inbucket receives approximately 4,500 messages per minute.*
+*Watching metrics while Inbucket handles over 4,000 messages per minute.*
 
 Development Status
 ------------------

config/config.go

@@ -15,6 +15,9 @@ type SmtpConfig struct {
 	Ip4address      net.IP
 	Ip4port         int
 	Domain          string
+	MaxRecipients   int
+	MaxIdleSeconds  int
+	MaxMessageBytes int
 }
 
 type WebConfig struct {
@@ -25,11 +28,21 @@ type WebConfig struct {
 	PublicDir     string
 }
 
-var smtpConfig *SmtpConfig
+type DataStoreConfig struct {
+	Path             string
+	RetentionMinutes int
+	RetentionSleep   int
+}
 
-var webConfig *WebConfig
+var (
+	// Global goconfig object
+	Config *config.Config
 
-var Config *config.Config
+	// Parsed specific configs
+	smtpConfig      *SmtpConfig
+	webConfig       *WebConfig
+	dataStoreConfig *DataStoreConfig
+)
 
 // GetSmtpConfig returns a copy of the SmtpConfig object
 func GetSmtpConfig() SmtpConfig {
@@ -41,6 +54,11 @@ func GetWebConfig() WebConfig {
 	return *webConfig
 }
 
+// GetDataStoreConfig returns a copy of the DataStoreConfig object
+func GetDataStoreConfig() DataStoreConfig {
+	return *dataStoreConfig
+}
+
 // LoadConfig loads the specified configuration file into inbucket.Config
 // and performs validations on it.
 func LoadConfig(filename string) error {
@@ -70,12 +88,19 @@ func LoadConfig(filename string) error {
 	requireOption(messages, "smtp", "ip4.address")
 	requireOption(messages, "smtp", "ip4.port")
 	requireOption(messages, "smtp", "domain")
+	requireOption(messages, "smtp", "max.recipients")
+	requireOption(messages, "smtp", "max.idle.seconds")
+	requireOption(messages, "smtp", "max.message.bytes")
 	requireOption(messages, "web", "ip4.address")
 	requireOption(messages, "web", "ip4.port")
 	requireOption(messages, "web", "template.dir")
 	requireOption(messages, "web", "template.cache")
 	requireOption(messages, "web", "public.dir")
 	requireOption(messages, "datastore", "path")
+	requireOption(messages, "datastore", "retention.minutes")
+	requireOption(messages, "datastore", "retention.sleep.millis")
+
+	// Return error if validations failed
 	if messages.Len() > 0 {
 		fmt.Fprintln(os.Stderr, "Error(s) validating configuration:")
 		for e := messages.Front(); e != nil; e = e.Next() {
@@ -96,15 +121,17 @@ func LoadConfig(filename string) error {
 
 // parseLoggingConfig trying to catch config errors early
 func parseLoggingConfig() error {
-	option := "[logging]level"
-	str, err := Config.String("logging", "level")
+	section := "logging"
+
+	option := "level"
+	str, err := Config.String(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	switch strings.ToUpper(str) {
 	case "TRACE", "INFO", "WARN", "ERROR":
 	default:
-		return fmt.Errorf("Invalid value provided for %v: %v", option, str)
+		return fmt.Errorf("Invalid value provided for [%v]%v: '%v'", section, option, str)
 	}
 	return nil
 }
@@ -112,89 +139,135 @@ func parseLoggingConfig() error {
 // parseSmtpConfig trying to catch config errors early
 func parseSmtpConfig() error {
 	smtpConfig = new(SmtpConfig)
+	section := "smtp"
 
 	// Parse IP4 address only, error on IP6.
-	option := "[smtp]ip4.address"
-	str, err := Config.String("smtp", "ip4.address")
+	option := "ip4.address"
+	str, err := Config.String(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	addr := net.ParseIP(str)
 	if addr == nil {
-		return fmt.Errorf("Failed to parse %v '%v'", option, str)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	addr = addr.To4()
 	if addr == nil {
-		return fmt.Errorf("Failed to parse %v '%v' not IPv4!", option, str)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v' not IPv4!", section, option, err)
 	}
 	smtpConfig.Ip4address = addr
 
-	option = "[smtp]ip4.port"
-	smtpConfig.Ip4port, err = Config.Int("smtp", "ip4.port")
+	option = "ip4.port"
+	smtpConfig.Ip4port, err = Config.Int(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 
-	option = "[smtp]domain"
-	str, err = Config.String("smtp", "domain")
+	option = "domain"
+	str, err = Config.String(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	smtpConfig.Domain = str
 
+	option = "max.recipients"
+	smtpConfig.MaxRecipients, err = Config.Int(section, option)
+	if err != nil {
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
+	}
+
+	option = "max.idle.seconds"
+	smtpConfig.MaxIdleSeconds, err = Config.Int(section, option)
+	if err != nil {
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
+	}
+
+	option = "max.message.bytes"
+	smtpConfig.MaxMessageBytes, err = Config.Int(section, option)
+	if err != nil {
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
+	}
+
 	return nil
 }
 
 // parseWebConfig trying to catch config errors early
 func parseWebConfig() error {
 	webConfig = new(WebConfig)
+	section := "web"
 
 	// Parse IP4 address only, error on IP6.
-	option := "[web]ip4.address"
-	str, err := Config.String("web", "ip4.address")
+	option := "ip4.address"
+	str, err := Config.String(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	addr := net.ParseIP(str)
 	if addr == nil {
-		return fmt.Errorf("Failed to parse %v '%v'", option, str)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	addr = addr.To4()
 	if addr == nil {
-		return fmt.Errorf("Failed to parse %v '%v' not IPv4!", option, str)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v' not IPv4!", section, option, err)
 	}
 	webConfig.Ip4address = addr
 
-	option = "[web]ip4.port"
-	webConfig.Ip4port, err = Config.Int("web", "ip4.port")
+	option = "ip4.port"
+	webConfig.Ip4port, err = Config.Int(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 
-	option = "[web]template.dir"
-	str, err = Config.String("web", "template.dir")
+	option = "template.dir"
+	str, err = Config.String(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	webConfig.TemplateDir = str
 
-	option = "[web]template.cache"
-	flag, err := Config.Bool("web", "template.cache")
+	option = "template.cache"
+	flag, err := Config.Bool(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	webConfig.TemplateCache = flag
 
-	option = "[web]public.dir"
-	str, err = Config.String("web", "public.dir")
+	option = "public.dir"
+	str, err = Config.String(section, option)
 	if err != nil {
-		return fmt.Errorf("Failed to parse %v: %v", option, err)
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
 	}
 	webConfig.PublicDir = str
 
 	return nil
 }
 
+// parseDataStoreConfig trying to catch config errors early
+func parseDataStoreConfig() error {
+	dataStoreConfig = new(DataStoreConfig)
+	section := "datastore"
+
+	option := "path"
+	str, err := Config.String(section, option)
+	if err != nil {
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
+	}
+	dataStoreConfig.Path = str
+
+	option = "retention.minutes"
+	dataStoreConfig.RetentionMinutes, err = Config.Int(section, option)
+	if err != nil {
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
+	}
+	option = "retention.sleep.millis"
+	dataStoreConfig.RetentionSleep, err = Config.Int(section, option)
+	if err != nil {
+		return fmt.Errorf("Failed to parse [%v]%v: '%v'", section, option, err)
+	}
+
+	return nil
+}
+
 // requireSection checks that a [section] is defined in the configuration file,
 // appending a message if not.
 func requireSection(messages *list.List, section string) {

etc/devel.conf

@@ -25,6 +25,17 @@ ip4.port=2500
 # used in SMTP greeting
 domain=inbucket.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=2048000
+
 #############################################################################
 [web]
 
@@ -51,3 +62,13 @@ public.dir=%(install.dir)s/themes/%(theme)s/public
 
 # 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=1
+
+# 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

etc/inbucket.conf

@@ -25,6 +25,17 @@ ip4.port=2500
 # used in SMTP greeting
 domain=inbucket.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
+
 #############################################################################
 [web]
 
@@ -51,3 +62,13 @@ public.dir=%(install.dir)s/themes/%(theme)s/public
 
 # 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

smtpd/datastore.go

@@ -15,6 +15,31 @@ import (
 	"time"
 )
 
+type DataStore interface {
+	MailboxFor(emailAddress string) (Mailbox, error)
+}
+
+type Mailbox interface {
+	GetMessages() ([]Message, error)
+	GetMessage(id string) (Message, error)
+	NewMessage() Message
+	String() string
+}
+
+type Message interface {
+	Id() string
+	From() string
+	Date() time.Time
+	Subject() string
+	ReadHeader() (msg *mail.Message, err error)
+	ReadBody() (msg *mail.Message, body *MIMEBody, err error)
+	ReadRaw() (raw *string, err error)
+	Append(data []byte) error
+	Close() error
+	Delete() error
+	String() string
+}
+
 var ErrNotWritable = errors.New("Message not writable")
 
 // Global because we only want one regardless of the number of DataStore objects
@@ -34,14 +59,14 @@ func countGenerator(c chan int) {
 
 // A DataStore is the root of the mail storage hiearchy.  It provides access to
 // Mailbox objects
-type DataStore struct {
+type FileDataStore struct {
 	path     string
 	mailPath string
 }
 
 // NewDataStore creates a new DataStore object.  It uses the inbucket.Config object to
 // construct it's path.
-func NewDataStore() *DataStore {
+func NewFileDataStore() DataStore {
 	path, err := config.Config.String("datastore", "path")
 	if err != nil {
 		log.Error("Error getting datastore path: %v", err)
@@ -52,12 +77,12 @@ func NewDataStore() *DataStore {
 		return nil
 	}
 	mailPath := filepath.Join(path, "mail")
-	return &DataStore{path: path, mailPath: mailPath}
+	return &FileDataStore{path: path, mailPath: mailPath}
 }
 
 // Retrieves the Mailbox object for a specified email address, if the mailbox
 // does not exist, it will attempt to create it.
-func (ds *DataStore) MailboxFor(emailAddress string) (*Mailbox, error) {
+func (ds *FileDataStore) MailboxFor(emailAddress string) (Mailbox, error) {
 	name := ParseMailboxName(emailAddress)
 	dir := HashMailboxName(name)
 	s1 := dir[0:3]
@@ -67,32 +92,32 @@ func (ds *DataStore) MailboxFor(emailAddress string) (*Mailbox, error) {
 		log.Error("Failed to create directory %v, %v", path, err)
 		return nil, err
 	}
-	return &Mailbox{store: ds, name: name, dirName: dir, path: path}, nil
+	return &FileMailbox{store: ds, name: name, dirName: dir, path: path}, nil
 }
 
 // A Mailbox manages the mail for a specific user and correlates to a particular
 // directory on disk.
-type Mailbox struct {
-	store   *DataStore
+type FileMailbox struct {
+	store   *FileDataStore
 	name    string
 	dirName string
 	path    string
 }
 
-func (mb *Mailbox) String() string {
+func (mb *FileMailbox) String() string {
 	return mb.name + "[" + mb.dirName + "]"
 }
 
 // GetMessages scans the mailbox directory for .gob files and decodes them into
 // a slice of Message objects.
-func (mb *Mailbox) GetMessages() ([]*Message, error) {
+func (mb *FileMailbox) GetMessages() ([]Message, error) {
 	files, err := ioutil.ReadDir(mb.path)
 	if err != nil {
 		return nil, err
 	}
 	log.Trace("Scanning %v files for %v", len(files), mb)
 
-	messages := make([]*Message, 0, len(files))
+	messages := make([]Message, 0, len(files))
 	for _, f := range files {
 		if (!f.IsDir()) && strings.HasSuffix(strings.ToLower(f.Name()), ".gob") {
 			// We have a gob file
@@ -101,7 +126,7 @@ func (mb *Mailbox) GetMessages() ([]*Message, error) {
 				return nil, err
 			}
 			dec := gob.NewDecoder(bufio.NewReader(file))
-			msg := new(Message)
+			msg := new(FileMessage)
 			if err = dec.Decode(msg); err != nil {
 				return nil, fmt.Errorf("While decoding message: %v", err)
 			}
@@ -115,14 +140,14 @@ func (mb *Mailbox) GetMessages() ([]*Message, error) {
 }
 
 // GetMessage decodes a single message by Id and returns a Message object
-func (mb *Mailbox) GetMessage(id string) (*Message, error) {
+func (mb *FileMailbox) GetMessage(id string) (Message, error) {
 	file, err := os.Open(filepath.Join(mb.path, id+".gob"))
 	if err != nil {
 		return nil, err
 	}
 
 	dec := gob.NewDecoder(bufio.NewReader(file))
-	msg := new(Message)
+	msg := new(FileMessage)
 	if err = dec.Decode(msg); err != nil {
 		return nil, err
 	}
@@ -135,12 +160,13 @@ func (mb *Mailbox) GetMessage(id string) (*Message, error) {
 
 // Message 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 *Mailbox
-	Id      string
-	Date    time.Time
-	From    string
-	Subject string
+type FileMessage struct {
+	mailbox *FileMailbox
+	// Stored in GOB
+	Fid      string
+	Fdate    time.Time
+	Ffrom    string
+	Fsubject string
 	// These are for creating new messages only
 	writable   bool
 	writerFile *os.File
@@ -148,27 +174,43 @@ type Message struct {
 }
 
 // NewMessage creates a new Message object and sets the Date and Id fields.
-func (mb *Mailbox) NewMessage() *Message {
+func (mb *FileMailbox) NewMessage() Message {
 	date := time.Now()
-	id := date.Format("20060102T150405") + "-" + fmt.Sprintf("%04d", <-countChannel)
+	id := generateId(date)
 
-	return &Message{mailbox: mb, Id: id, Date: date, writable: true}
+	return &FileMessage{mailbox: mb, Fid: id, Fdate: date, writable: true}
 }
 
-func (m *Message) String() string {
-	return fmt.Sprintf("\"%v\" from %v", m.Subject, m.From)
+func (m *FileMessage) Id() string {
+	return m.Fid
 }
 
-func (m *Message) gobPath() string {
-	return filepath.Join(m.mailbox.path, m.Id+".gob")
+func (m *FileMessage) Date() time.Time {
+	return m.Fdate
 }
 
-func (m *Message) rawPath() string {
-	return filepath.Join(m.mailbox.path, m.Id+".raw")
+func (m *FileMessage) From() string {
+	return m.Ffrom
+}
+
+func (m *FileMessage) Subject() string {
+	return m.Fsubject
+}
+
+func (m *FileMessage) String() string {
+	return fmt.Sprintf("\"%v\" from %v", m.Fsubject, m.Ffrom)
+}
+
+func (m *FileMessage) gobPath() string {
+	return filepath.Join(m.mailbox.path, m.Fid+".gob")
+}
+
+func (m *FileMessage) rawPath() string {
+	return filepath.Join(m.mailbox.path, m.Fid+".raw")
 }
 
 // ReadHeader opens the .raw portion of a Message and returns a standard Go mail.Message object
-func (m *Message) ReadHeader() (msg *mail.Message, err error) {
+func (m *FileMessage) ReadHeader() (msg *mail.Message, err error) {
 	file, err := os.Open(m.rawPath())
 	defer file.Close()
 	if err != nil {
@@ -182,7 +224,7 @@ func (m *Message) ReadHeader() (msg *mail.Message, err error) {
 // ReadBody opens the .raw portion of a Message and returns a MIMEBody object, along
 // with a free mail.Message containing the Headers, since we had to make one of those
 // anyway.
-func (m *Message) ReadBody() (msg *mail.Message, body *MIMEBody, err error) {
+func (m *FileMessage) ReadBody() (msg *mail.Message, body *MIMEBody, err error) {
 	file, err := os.Open(m.rawPath())
 	defer file.Close()
 	if err != nil {
@@ -201,7 +243,7 @@ func (m *Message) ReadBody() (msg *mail.Message, body *MIMEBody, err error) {
 }
 
 // ReadRaw opens the .raw portion of a Message and returns it as a string
-func (m *Message) ReadRaw() (raw *string, err error) {
+func (m *FileMessage) ReadRaw() (raw *string, err error) {
 	file, err := os.Open(m.rawPath())
 	defer file.Close()
 	if err != nil {
@@ -218,7 +260,7 @@ func (m *Message) ReadRaw() (raw *string, err error) {
 
 // Append data to a newly opened Message, this will fail on a pre-existing Message and
 // after Close() is called.
-func (m *Message) Append(data []byte) error {
+func (m *FileMessage) Append(data []byte) error {
 	// Prevent Appending to a pre-existing Message
 	if !m.writable {
 		return ErrNotWritable
@@ -240,7 +282,7 @@ func (m *Message) Append(data []byte) error {
 
 // Close this Message for writing - no more data may be Appended.  Close() will also
 // trigger the creation of the .gob file.
-func (m *Message) Close() error {
+func (m *FileMessage) Close() error {
 	// nil out the writer fields so they can't be used
 	writer := m.writer
 	writerFile := m.writerFile
@@ -268,7 +310,7 @@ func (m *Message) Close() error {
 }
 
 // Delete this Message from disk by removing both the gob and raw files
-func (m *Message) Delete() error {
+func (m *FileMessage) Delete() error {
 	log.Trace("Deleting %v", m.gobPath())
 	err := os.Remove(m.gobPath())
 	if err != nil {
@@ -280,7 +322,7 @@ func (m *Message) Delete() error {
 
 // createGob reads the .raw file to grab the From and Subject header entries,
 // then creates the .gob file.
-func (m *Message) createGob() error {
+func (m *FileMessage) createGob() error {
 	// Open gob for writing
 	file, err := os.Create(m.gobPath())
 	defer file.Close()
@@ -296,8 +338,8 @@ func (m *Message) createGob() error {
 	}
 
 	// Only public fields are stored in gob
-	m.From = msg.Header.Get("From")
-	m.Subject = msg.Header.Get("Subject")
+	m.Ffrom = msg.Header.Get("From")
+	m.Fsubject = msg.Header.Get("Subject")
 
 	// Write & flush
 	enc := gob.NewEncoder(writer)
@@ -308,3 +350,16 @@ func (m *Message) createGob() error {
 	writer.Flush()
 	return nil
 }
+
+// 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)
+}

smtpd/handler.go

@@ -294,8 +294,8 @@ func (ss *Session) dataHandler() {
 	msgSize := 0
 
 	// Get a Mailbox and a new Message for each recipient
-	mailboxes := make([]*Mailbox, ss.recipients.Len())
-	messages := make([]*Message, ss.recipients.Len())
+	mailboxes := make([]Mailbox, ss.recipients.Len())
+	messages := make([]Message, ss.recipients.Len())
 	i := 0
 	for e := ss.recipients.Front(); e != nil; e = e.Next() {
 		recip := e.Value.(string)

smtpd/listener.go

@@ -16,7 +16,7 @@ type Server struct {
 	maxRecips       int
 	maxIdleSeconds  int
 	maxMessageBytes int
-	dataStore       *DataStore
+	dataStore       DataStore
 }
 
 // Raw stat collectors
@@ -40,10 +40,10 @@ var expWarnsHist = new(expvar.String)
 
 // Init a new Server object
 func New() *Server {
-	ds := NewDataStore()
-	// TODO Make more of these configurable
-	return &Server{domain: config.GetSmtpConfig().Domain, maxRecips: 100, maxIdleSeconds: 300,
-		dataStore: ds, maxMessageBytes: 2048000}
+	ds := NewFileDataStore()
+	cfg := config.GetSmtpConfig()
+	return &Server{dataStore: ds, domain: cfg.Domain, maxRecips: cfg.MaxRecipients,
+		maxIdleSeconds: cfg.MaxIdleSeconds, maxMessageBytes: cfg.MaxMessageBytes}
 }
 
 // Main listener loop

web/context.go

@@ -10,7 +10,7 @@ import (
 type Context struct {
 	Vars      map[string]string
 	Session   *sessions.Session
-	DataStore *smtpd.DataStore
+	DataStore smtpd.DataStore
 }
 
 func (c *Context) Close() {
@@ -20,7 +20,7 @@ func (c *Context) Close() {
 func NewContext(req *http.Request) (*Context, error) {
 	vars := mux.Vars(req)
 	sess, err := sessionStore.Get(req, "inbucket")
-	ds := smtpd.NewDataStore()
+	ds := smtpd.NewFileDataStore()
 	ctx := &Context{
 		Vars:      vars,
 		Session:   sess,