Sendmail Alternatives for Linux

    There are many alternatives to Sendmail for Linux if you are looking for a replacement. The best Linux alternative is Zentyal. It's not free, so if you're looking for a free alternative, you could try Postfix or Zimbra Collaboration Suite. If that doesn't suit you, our users have ranked more than 25 alternatives to Sendmail and 18 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Sendmail are OpenSMTPD (Free, Open Source), sSMTP (Free, Open Source), Exim (Free, Open Source) and msmtp (Free, Open Source).

    This page was last updated Nov 25, 2021

    1. Zentyal is a native Microsoft Active Directory implementation on Linux incorporating all the network services required in a small and medium business environment: Directory & Domain Server, Mail Server, Gateway and Infrastructure Server.
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      • FreeOpen Source
      • Mac
      • Linux
      Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and secure. The software is also known by its former names VMailer and IBM Secure Mailer.


    2. Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
      • FreeOpen Source
      • Linux
      • BSD
      • Self-Hosted
      OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions. It allows ordinary machines to exchange e-mails with other systems speaking the SMTP protocol.
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    3. sSMTP is a simple MTA to deliver mail from a computer to a mail server. sSMTP is simple and lightweight, there are no daemons or anything hogging up CPU; Just sSMTP. Unlike Exim4, sSMTP does not receive mail, expand aliases, or manage a queue.

      Discontinued

      The last update was in 2013.

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      • FreeOpen Source
      • Mac
      • Linux
      Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
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      • FreeOpen Source
      • Linux
      • Xfce
      In the default mode, it transmits a mail to an SMTP server (for example at a free mail provider) which takes care of further delivery.
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      • FreeOpen Source
      • Mac
      • Linux
      • BSD
      • Self-Hosted
      The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework.
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    4. A small Mail Transport Agent (MTA), designed for home and office use. Part of DragonFly BSD , it accepts mails from locally installed Mail User Agents (MUA) and delivers the mails either locally or to a remote destination.
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    5. Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.
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    Showing 10 of 18 alternatives