Tarmail is a complete SMTP server designed to be
resistant to abuse. Unwanted messages are rejected during the SMTP dialogue, instead of afterwards. Tarmail features greylisting, per-user whitelisting, banning by IP, and strict RFC2821 enforcement to screen out abusive senders before the message is accepted. The configuration file is easy to understand and well-documented to help get you up and running right away.
License: GNU General Public License v2
Changes:
This release has several major improvements,
including a new mailq program, several bugfixes,
and removal of the requirement for LMTP.