E-Mail Hosting Solutions -

Roundcube Roundcube - Free webmail for the masses.
phpList phplist is an open-source newsletter manager
poMMo poMMo is versatile mass mailing software
SquirrelMail SquirrelMail is a standards-based webmail package written in PHP
WebMail Lite WebMail Lite is Fast and easy-to-use webmail front-end for your existing IMAP mail server.
Webinsta Maillist WEBinsta mailing list manager is built to provide a centralized mailing list
OpenNewsletter OpenNewsletter is a web-based newsletter system
ccMail CcMail is a free, open, powerful Mailing List Manager