Anti-Spam SMTP Proxy Server implements multiple spam filters
Powerful Open Source Email Marketing app with analytics & segmentation
Unified Communications Server
Multi user address book application accessable through the web.
An unofficial web console to administer Apache James 3 server
The free cross-platform antivirus software tool-kit
Obsolete SARE rule archive - SpamAssassin autogenerated rules
File sharing via e-mail
Business webmail modular application with mobile client
Webmail made easy!
ncurses VCard 3.0 contact management editor
A very simple Email Extractor
This is a php script that runs outside Drupal to send your Simplenews