Exim - Exim is a MTA developed at the University of Cambridge for use on Unix systems connected to the Internet.
qmail - Discusson of another new MTA - qmail.
General Email Discussions - General discussion of Email server configurations.
IMAP - Discussion of Internet Message Access Protocol (IMAP).

Email Clients
Pegasus Mail - A free, standards-based email client suitable for use by single or multiple users on single computers or on local area networks.
Pine - Pine stands for Program for Internet News & Email - is a tool for reading, sending, and managing electronic messages.
Mutt - A small but very powerful text-based mail client for Unix operating systems.
Eudora on Windows - Discussion of Eudora for Windows.
Eudora on MAC - Discussion of Eudora for MAC.
Windows Email - General Email discussion on Windows.