secure, reliable, fast MTA
JavaScript/XML engine for Apache
Full SMTP/Mail server Appliance in 5 minutes
one server framework
Multi-protocol server written in Java
An easy-to-use anti-spam email gateway
Multi user address book application accessable through the web.
Secure mail + Tor gateway
Petidomo is a small, easy-to-administer mailing list server
IMAP to IMAP Copy
an 'auto-reply' bot for your mail server
CheckeredFlag is a super simple mail server.
An unofficial web console to administer Apache James 3 server
Synology DSM installable package for Baïkal CalDAV & CardDAV server
Drosera is open-source orienteering management server.
Business webmail modular application with mobile client