/smtpd

Go SMTP server library

Primary LanguageGoMIT LicenseMIT

Go smtpd GoDoc Go Report Card

Package smtpd implements an SMTP server in golang.

Features

  • 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

Version numbers

The package is tagged with semantic version numbers, making it suitable for use in a Go Module.

Feedback

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.