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Microsoft SMTP Server Alternatives

Microsoft SMTP Server is described as 'Configure SMTP e-mail in IIS when you want to deliver e-mail messages from your site. Mail can be delivered immediately or it can be delivered to a file location on disk where it can be retrieved for delivery later' and is an app in the office & productivity category. There are more than 10 alternatives to Microsoft SMTP Server for a variety of platforms, including Linux, Mac, Windows, BSD and Self-Hosted solutions. The best alternative is Postfix, which is both free and Open Source. Other great apps like Microsoft SMTP Server are OpenSMTPD, sSMTP, Sendmail and Exim.

Microsoft SMTP Server 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 Microsoft SMTP Server.
This page was last updated Apr 19, 2018
  • Windows

Configure SMTP e-mail in IIS when you want to deliver e-mail messages from your site. Mail can be delivered immediately or...

Learn more about Microsoft SMTP Server

  1. 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.

  2. OpenSMTPD

    • 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.

    No screenshots yet


  3. sSMTP

    • FreeOpen Source
    • Linux

    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.

    No screenshots yet
  4. 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.

  5. 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

    • 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 Email Server

    • Linux
    • Online

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.

  8. Dragonfly Mail Agent

    • FreeOpen Source
    • Linux
    • BSD

    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.

    No screenshots yet
  9. 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.

  10. BulkMTA

    • Mac
    • Windows
    • Linux

    BulkMTA is Commercial Mail Server Similar to PowerMTA. IP Rotation, DKIM, Sender / Receiver Rate limiting.

    No screenshots yet
Showing 10 of 13 alternatives