Pegasus Mail

Pegasus Mail (PMail) is the Internet's longest serving email client and is free, a standards-based email client suitable for use by single or multiple users on single computers or on local area networks (LAN). A proven product, it has served millions of users since it was released in 1990. It is extremely feature-rich and powerful, yet remains small and fast.

The Mercury Mail Transport SYstem is a free, standards-based mail server solution, providing extensive, fast server support for all major Internet e-mail protocols. It is supplied in two versions, one hosted on Windows systems, the other running as a set of NLMs on Novell NetWare file servers.