Package smtpd implements an SMTP server in golang.
- STARTTLS (using
crypto/tls) - Authentication (PLAIN/LOGIN, only after STARTTLS)
- XCLIENT and PROXY protocol (for running behind a proxy)
- Connection, HELO, sender and recipient checks for rejecting e-mails using callbacks
- Configurable limits for: connection count, message size and recipient count
- Hands incoming e-mail off to a configured callback function
If you end up using this package or have any feedback, I'd very much like to hear about it. You can reach me by email.