Open WebMail Project : Open WebMail is a webmail system based on the Neomail version 1.14 from Ernie Miller. Open WebMail is designed to manage very large mail folder files ...
SquirrelMail : SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages...
Mautic is marketing automation software (email, social & more). Social Media Marketing, Contact Management, Email Marketing, Forms, Campaigns, Reports