The classic email sending library for PHP
A faster, leaner email client and fork of Nylas Mail
Open source email service with a strong focus on security and privacy
High performance, self-hosted, newsletter and mailing list manager
Unofficial ProtonMail Desktop App
Lightweight Open Source webmail written in PHP and JavaScript
Anti-Spam SMTP Proxy Server implements multiple spam filters
Windows eml and mbox viewer.
SMTP email proxy and relay server
Powerful Open Source Email Marketing app with analytics & segmentation
Fast Bayesian spam filter along lines suggested by Paul Graham
SaltOS, ERP, CRM, Business Management Suite, Josep Sanz Campderrós
Sasa is a collection of organized extensions to the .NET framework.
NaSMail is a standards-based webmail package written in PHP