exim Internet Mailer

• RPMS of Exim

MMDF

Postfix (AKA IBM Secure Mailer)

qmail: a replacement for sendmail

Install-Qmail a script to create the configuration files for Qmail

qmail Mailing List Archives

Another qmail list archive

Sendmail

• The Sendmail Newsgroup
• Sendmail.cf generator for version 8.7, 8.8 and 8.9
• an article with a useful section on how to get sendmail working over a PPP link
• Install-Sendmail a script to create the configuration files for Sendmail
• Sendmail Installation and Operation Guide

Smail - GNU Project - Free Software Foundation (FSF)

ZMailer

Serialmail