OStatic

CloroMail is a PHP/DHTML-based web email client or webmail system application. It features management for folders, contacts and user preferences; send...

phpQmailAdmin - QMail mail messages administration tool. Includes viewing, moving, deleting, copying messages between users. Supports attachments and ...

NullLogic Groupware is a modular Web-based groupware and email system designed for contact management and event scheduling. Additional features includ...

Riser is a groupware, framework, and EIP system. It lets you make appointments, share files, send and receive email, schedule meetings, and more, from...

Quotient is multi-protocol (SMTP, POP, IMAP, SIP, HTTP, Q2Q) server that helps with all your online conversations, be they over email, IRC, IM, mailin...

libspf is a portable ANSI C implementation of the Sender Policy Framework.