Alternatives to PowerMTA for all platforms with any license

Platforms

Desktop

Web / Online

Indie / Classic

  • Zentyal icon

    Zentyal

    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...

    Open Source Linux

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  • Postfix icon

    Postfix

    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.

    Open Source Mac Linux

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  • Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

    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...

    Freemium Linux Web / Cloud

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  • Microsoft Exchange Server icon

    Microsoft Exchange Server

    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...

    Commercial Windows Web / Cloud

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  • Exim icon

    Exim

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

    Open Source Mac Windows Linux

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  • hMail Server icon

    hMail Server

    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. It supports the common e-mail protocols (IMAP, SMTP and...

    Open Source Windows

  • Courier-MTA icon

    Courier-MTA

    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...

    Open Source Mac Linux BSD Self-Hosted

  • Sendmail icon

    Sendmail

    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. A descendant...

    Open Source Mac Linux

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  • Atmail Email Server icon

    Atmail Email Server

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. Features: Webmail Calendar Addressbook IMAP, POP or Exchange WebSync SMTP/POP3/IMAP server Explore the...

    Commercial Linux Web / Cloud

  • AtMail Open icon

    AtMail Open

    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. The open source version of...

    Open Source Web / Cloud

    • Discontinued No longer supported.
  • Xeams icon

    Xeams

    Xeams is a secure & powerful mail server for Windows, Linux, Solaris, MacOSX and other flavors or UNIX, which supports SMTP, POP3, and IMAP. It includes a powerful spam/junk filtering engine that elimates up to 99% of junk email...

    Free Personal Mac Windows Linux BSD

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  • SmarterMail Mail Server icon

    SmarterMail Mail Server

    SmarterMail delivers Exchange-level email server software features for a fraction of the cost. With lower hardware requirements, superior stability and reduced maintenance costs, SmarterMail has significantly lower Total Cost of...

    Freemium Windows

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  • ArgoSoft Mail Server icon

    ArgoSoft Mail Server

    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...

    Freemium Windows

    No features added Add a feature
  • iMail icon

    iMail

    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...

    Free Windows Self-Hosted

    No features added Add a feature

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