Anti-Spam SMTP Proxy Server implements multiple spam filters
Powerful Open Source Email Marketing app with analytics & segmentation
SaltOS, ERP, CRM, Business Management Suite, Josep Sanz Campderrós
Simple-to-use/-install issue-tracking system: web, REST, email, CLI
Multi-protocol server written in Java
Simple, web-based address & phone book
Free and open source webmail software
Source code for be able to use Relation Tags.
ncurses VCard 3.0 contact management editor
Keep up to date with your mail! Notifications, easy configuration.
Provide a Java Mail Provider for Exchange-hosted mailboxes