diff --git a/doc/config.md b/doc/config.md
index 6495f95..4d11a1a 100644
--- a/doc/config.md
+++ b/doc/config.md
@@ -10,7 +10,7 @@ variables it supports:
     KEY                                 DEFAULT             DESCRIPTION
     INBUCKET_LOGLEVEL                   info                debug, info, warn, or error
     INBUCKET_LUA_SCRIPT                 inbucket.lua        Lua script path
-    INBUCKET_MAILBOXNAMING              local               Use local or full addressing
+    INBUCKET_MAILBOXNAMING              local               Use local, full, or domain 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
diff --git a/pkg/config/config.go b/pkg/config/config.go
index 449ba88..fe56268 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -60,7 +60,7 @@ func (n *mbNaming) Decode(v string) error {
 type Root struct {
 	LogLevel      string `required:"true" default:"info" desc:"debug, info, warn, or error"`
 	Lua           Lua
-	MailboxNaming mbNaming `required:"true" default:"local" desc:"Use local, full or domain addressing"`
+	MailboxNaming mbNaming `required:"true" default:"local" desc:"Use local, full, or domain addressing"`
 	SMTP          SMTP
 	POP3          POP3
 	Web           Web