Dragonfly Mail Agent Alternatives

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

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

Open Source

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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.

Open Source

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

Configure SMTP e-mail in IIS when you want to deliver e-mail messages from your site.

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.

msmtp is an SMTP client.

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

Open Source

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open...

Open Source

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

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

BulkMTA is Commercial Mail Server Similar to PowerMTA.