MailerQ - MailerQ is a high performance Mail Transfer Agent (MTA) designed for delivering large volume email messages at very high speeds.
Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.
turboSMTP - turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all...
Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
SMTP - SMTP provides scalable affordable email infrastructure for all your sending needs.
Sendmail - Sendmail is a general purpose internetwork email routing facility that supports many kinds of...