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    Sendmail Alternatives

    Sendmail is described as 'general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet' and is a Mail Server in the online services category. There are more than 25 alternatives to Sendmail for a variety of platforms, including Linux, Windows, Self-Hosted solutions, Mac and Online / Web-based. The best alternative is Zimbra Collaboration Suite, which is both free and Open Source. Other great apps like Sendmail are Zentyal, Postfix, Mail-in-a-box and OpenSMTPD.

    Sendmail is mainly a Mail Server but alternatives to it may also be WebMail Providers or Email Clients. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Sendmail.
    This page was last updated May 23, 2022
    • FreeOpen Source
    • Mac
    • Linux
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    Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery...
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    1. 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.
    2. 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.


      • FreeOpen Source
      • Mac
      • Linux
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      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.
    3. Easy-to-deploy mail server.
      • FreeOpen Source
      • Linux
      • BSD
      • Self-Hosted
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      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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    4. Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is widely used by enterprises using Microsoft infrastructure solutions.
      • FreeOpen Source
      • Linux
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      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
      • Linux
      • Xfce
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      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
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      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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      • Windows
      • Self-Hosted
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      Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited mail accounts, storage, attachment size, custom logo. Free for commercial use.
    Showing 10 of 27 alternatives