Complete and feature rich groupware solution - Spam daemon

Complete and feature rich groupware solution - email spooler

Complete and feature rich groupware solution - admin tools

Interface to Cyrus imap client imclient library

Calendar Extension for Thunderbird - Transitional package

Web-based mailing list manager (legacy branch)

text-based mailreader supporting MIME, GPG, PGP and threading

command line mail reader based on Mutt, with added features

Milter implementation of DMARC

secure, reliable, lean, and easy-to configure SMTP server

a secure, reliable, efficient, simple message transfer agent

user ids and group ids for qmail

Tools for compiling SpamAssassin rules into C

Scalable groupware server

Scalable groupware server - common files

Perl-based spam filter using text analysis

Client for SpamAssassin spam filtering daemon

query SPF (Sender Policy Framework) to validate mail senders

Modern mailing list manager

mail/news client with RSS, chat and integrated spam filter support