1. Postfix

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

  2. Sendmail

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

  3. Exim

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

  4. sSM

    sSMTP

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

  5. Microsoft SMTP Server

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

  6. DMA

    Dragonfly Mail Agent

    A small Mail Transport Agent (MTA), designed for home and office use. Part of ...

  7. m

    msmtp

    msmtp is an SMTP client.

  8. OpenSMTPD

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

  9. Hectane

    Lightweight, cross-platform SMTP client

  10. Courier-MTA

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

  11. BulkMTA

    BulkMTA is Commercial Mail Server Similar to PowerMTA.

  12. blat

    Blat is a small, efficent SMTP command line mailer for Windows.