OStatic

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.

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...