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Free PowerMTA Alternatives

The best free alternative to PowerMTA is Zimbra Collaboration Suite, which is also Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to PowerMTA and 12 is free so hopefully you can find a suitable replacement. Other interesting free alternatives to PowerMTA are Postfix, hMail Server, Sendmail and Exim.

PowerMTA alternatives are mainly Mail Servers but 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 PowerMTA.
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  • Windows
  • Linux
  • Self-Hosted

Email gateway application (SMTP server) that makes it easy for senders to adopt the latest authentication specifications (...

Learn more about PowerMTA

  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.

    Screenshot
  2. Postfix icon

    Postfix

    • 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.

    Screenshot


  3. hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.

    Screenshot
  4. Sendmail icon

    Sendmail

    • FreeOpen Source
    • Mac
    • Linux

    Sendmail is a 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.

    Main Page
  5. Exim icon

    Exim

    • 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.

    No screenshots yet


  6. Courier-MTA icon

    Courier-MTA

    • 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.

    No screenshots yet
  7. AtMail Open icon

    AtMail Open

    • FreeOpen Source
    • Online

    AtMail is an open source webmail client written in PHP. We aim to provide a elegant Ajax webmail client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface.

    Discontinued

    No longer supported.

    AtMail Interface
  8. SmarterMail Mail Server icon

    SmarterMail Mail Server

    • FreemiumProprietary
    • Windows

    SmarterMail delivers Exchange-level email server software features for a fraction of the cost.

    SmarterMail webmail interface
  9. Xeams icon

    Xeams

    • Free PersonalProprietary
    • Mac
    • Windows
    • Linux
    • BSD

    Xeams is a secure and powerful mail server for that includes a powerful spam filtering engine that eliminates up to 99% of junk email right out of the box. The software offers a flexible approach to email, making it a very user friendly server.

    No screenshots yet
  10. ArgoSoft Mail Server icon

    ArgoSoft Mail Server

    • FreemiumProprietary
    • Windows

    Powerful and simple SMTP/POP3/Finger server, with built in Web interface for accessing mail via Web browser. Supports security features, such as SMTP authentication. Has built-in TZO client for users without static IP address. Version 1.8.8.

    No screenshots yet
Showing 10 of 12 alternatives