Sendmail AlternativesMail Servers and other similar apps like Sendmail

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, Self-Hosted, Windows, Mac and BSD apps. The best Sendmail alternative is Mail-in-a-box, which is both free and Open Source. Other great apps like Sendmail are Postfix, Zimbra Collaboration Suite, Zentyal and Microsoft Exchange.

Sendmail iconSendmail
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Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery...

More about Sendmail
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Sendmail alternatives page was last updated Sep 9, 2022
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  1. Mail-in-a-box icon

    Mail-in-a-box

     22 likes
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    Easy-to-deploy mail server.

    17 Mail-in-a-box alternatives

    License model

    • Free • Open Source

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Self-Hosted
    • Roundcube
    Control Panel

    Properties

    1.  Privacy focused

    Features

    1.  Two-factor Authentication
    2.  IMAP Support
    3. Nextcloud icon  Nextcloud integration

    Mail-in-a-box VS Sendmail

     

    • Mail-in-a-box is the most popular Self-Hosted alternative to Sendmail.

    • Mail-in-a-box is the most popular Open Source & free alternative to Sendmail.

    • Mail-in-a-box is Free and Open SourceSendmail is also Free and Open Source
    • Mail-in-a-box is Privacy focusedSendmail is not according to our users
  2. Postfix icon

    Postfix

     25 likes
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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.

    26 Postfix alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Mac
    • Linux
    Postfix screenshot 1

    Postfix Features

    1.  Mail Filtering

    Postfix VS Sendmail

     

    • Almost everyone thinks Postfix is a great Sendmail alternative.

    • Postfix is the most popular Mac & Linux alternative to Sendmail.

    • Postfix is Free and Open SourceSendmail is also Free and Open Source
  4. Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

     35 likes
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    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.

    44 Zimbra Collaboration Suite alternatives

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Linux
    • Online
    • Self-Hosted
    Zimbra Collaboration Suite screenshot 1

    Zimbra Collaboration Suite Features

    1.  Real time collaboration
    2.  ActiveSync
    3. Microsoft Active Directory icon  Active Directory integration

    Zimbra Collaboration Suite VS Sendmail

     

    • Zimbra Collaboration Suite is the most popular Web-based alternative to Sendmail.

    • Zimbra Collaboration Suite is Freemium and Open SourceSendmail is Free and Open Source
  5. Zentyal icon

    Zentyal

     54 likes
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    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.

    26 Zentyal alternatives

    License model

    Application types

    Country of Origin

    • ES flagSpain
    • European Union flagEU

    Platforms

    • Linux
    Dashboard

    Zentyal Features

    1.  Gateway
    2.  Member Directory
    3.  Web interface

    Zentyal VS Sendmail

     

    • Zentyal is the most popular commercial alternative to Sendmail.

    • Zentyal is Paid and Open SourceSendmail is Free and Open Source
  6. Microsoft Exchange icon

    Microsoft Exchange

     17 likes
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    Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.

    43 Microsoft Exchange alternatives

    License model

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Windows
    • Online
    • Self-Hosted
    • Microsoft Office 365
    Microsoft Exchange screenshot 1

    Microsoft Exchange Features

    1.  Real time collaboration

    Microsoft Exchange VS Sendmail

     

    • Microsoft Exchange is the most popular Windows alternative to Sendmail.

    • Microsoft Exchange is Paid and ProprietarySendmail is Free and Open Source
  7. Haraka icon

    Haraka

     3 likes
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    Haraka is an open source SMTP server written in Node.js which provides extremely high performance coupled with a flexible plugin system allowing Javascript programmers full access to change the behaviour of the server.

    License model

    • Free • Open Source

    Country of Origin

    • International

    Platforms

    • Self-Hosted
    • Node.JS

    Haraka Features

    1.  Support for Javascript

    Haraka VS Sendmail

     
  9. Exim icon

    Exim

     11 likes
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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.

    18 Exim alternatives

    License model

    • Free • Open Source

    Application type

    Country of Origin

    • International

    Platforms

    • Mac
    • Linux

    Exim Features

    1.  SMTP Support

    Exim VS Sendmail

     
  10. CrossBox icon

    CrossBox

     1 like
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    Real-time email, chat, audio/video calls & conferences, file-sharing, and contacts app with a modern and intuitive UI.

    License model

    Application types

    Country of Origin

    • BA flagBosnia & Herzegovina

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    View Mailbox (Dark mode)

    CrossBox Features

    1.  File Hosting

    CrossBox VS Sendmail

     

    • CrossBox is the most popular Android, iPhone, iPad & Android Tablet alternative to Sendmail.

    • CrossBox is Paid and ProprietarySendmail is Free and Open Source
  11. OpenSMTPD icon

    OpenSMTPD

     6 likes
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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.

    License model

    • Free • Open Source

    Platforms

    • Linux
    • BSD
    • Self-Hosted

    OpenSMTPD Features

    1.  SMTP Support

    OpenSMTPD VS Sendmail

     

  12. sSMTP

     3 likes
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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.

    License model

    • Free • Open Source

    Platforms

    • Linux
    Discontinued

    The last update was in 2013.

    sSMTP Features

    1. Node.js icon  Support for Node.js
    2.  SMTP Support

    sSMTP VS Sendmail

     
  13. Courier-MTA icon

    Courier-MTA

     7 likes
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    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.

    License model

    • Free • Open Source

    Application type

    Platforms

    • Mac
    • Linux
    • BSD
    • Self-Hosted

    Courier-MTA Features

    1.  Mail Filtering
    2.  SMTP Support
    3.  IMAP Support

    Courier-MTA VS Sendmail

     

  14. Dragonfly Mail Agent

     3 likes
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    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.

    License model

    • Free • Open Source

    Platforms

    • Linux
    • BSD

    Dragonfly Mail Agent Features

    1.  SMTP Support

    Dragonfly Mail Agent VS Sendmail

     
12 of 27 Sendmail alternatives