SMTP Server Software

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

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.

Level up retention marketing with Moda's Email & SMS automation tool that integrates with Shopify, leverages realtime data to deliver exceptional experience.

Try for free freemium $15.0 / Monthly ( Up to 1,000 contacts,Unlimited emails,50 SMS credits)

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

Web-based IMAP email client

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

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

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

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

hMailServer is a free e-mail server for Microsoft Windows.

An open source mailserver suite.

CMail is a free Windows command line mailer with advanced message formatting options.

free

msmtp is an SMTP client.

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