Anti-Spam SMTP Proxy Server implements multiple spam filters
The classic email sending library for PHP
Local, web-based mail server application. Slurp mails into oblivion!
Take back control of your email with this mail server in a box
Catches mail and serves it through a dream
Lightweight Open Source webmail written in PHP and JavaScript
Universal server
SMTP email proxy and relay server
Client daemon to move mail from POP and IMAP to your local computer
Powerful Open Source Email Marketing app with analytics & segmentation
Fast Bayesian spam filter along lines suggested by Paul Graham
Anti Spam SMTP Gateway
Booking/reservation of meeting rooms/equipment with e-mail invitations
Script set to archive emails at groupwise server side
Web and API based SMTP testing
Zentyal is a Linux Small Business Server
secure, reliable, fast MTA
Simple, modern & fast web-based email client
Full SMTP/Mail server Appliance in 5 minutes