mapSoN is a challenge/response spam filter for Unix
Secure mail + Tor gateway
Petidomo is a small, easy-to-administer mailing list server
Jnestor is another majordomo in java
Protects you from spam mails and virus mails effectively with milter
IMAP to IMAP Copy
imap cleanup & command line tool
an 'auto-reply' bot for your mail server
Pweb-cyradm is an web-based administrative tool for postfix/cyrus.
CheckeredFlag is a super simple mail server.
Conversion from *.mht files to *.htm files.
An unofficial web console to administer Apache James 3 server