Exim Alternatives

Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

Sendmail is a general purpose internetwork email routing facility that supports many kinds of...

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

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Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

sSMTP is a simple MTA to deliver mail from a computer to a mail server.

MailerQ is a high performance Mail Transfer Agent (MTA) designed for delivering large volume email messages at very high speeds.

A fully fledged, free email server solution, an open source project (GPL v2).

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...

PowerMTA is an industrial-strength software for high-volume email delivery.

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

msmtp is an SMTP client.

qmail is the name of an advanced level of mail transfer agent for the UNIX based operating systems.

Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with...

Web-based IMAP email client