github.com/digibib/gosmtpd

A very simple SMTP server with a REST API

A server that accepts smtp request and saves the emails in memory for later retrieval.

Usage

usage: gosmtpd [<flags>]

Flags:
  --help              Show help (also see --help-long and --help-man).
  --webport=WEBPORT   Port the web server should run on (Default: 8000)
  --hostname="localhost"  
                      Hostname for the smtp server to listen to
  --port="2525"       Port for the smtp server to listen to
  --forwardhost=FORWARD_HOST
                      The hostname after the @ that we should forward i.e. gmail.com
  --forwardsmtp=FORWARD_SMTP
                      SMTP server to forward the mail to
  --forwardport=FORWARD_PORT
                      The port on which email should be forwarded (Default: 25)
  --forwarduser=FORWARD_USER
                      The username for the forward host
  --forwardpassword=FORWARD_PASSWORD
                      Password for the user
  --mailexpiration=300  
                      Time in seconds for a mail to expire, and be removed from database
  --version           Show application version.

GET /status

Returns a 200 if the service is up

GET /mail

List all mails

GET /inbox/:email

List all email for a given email address

GET /email/:id

Get an email by id

DELETE /inbox/:email

Delete all mails for a given email

DELETE /email/:id

Delete a email via the id

Trying it out

You can install it by doing

docker pull sorenmat/gosmtpd

docker start sorenmat/gosmtpd