Alternatives to Microsoft SMTP Server for all platforms with any license



Web / Online

Indie / Classic

  • Postfix icon


    Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and...

    Open Source Mac Linux

  • Exim icon


    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

  • Courier-MTA icon


    The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP...

    Open Source Mac Linux BSD Self-Hosted

  • Sendmail icon


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

    Open Source Mac Linux

  • 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. ...

    Commercial Linux Web / Cloud

  • OpenSMTPD icon


    OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions....

    Open Source Linux BSD Self-Hosted

  • AtMail Open icon

    AtMail Open Discontinued

    AtMail is an open source webmail client written in PHP. We aim to provide a elegant Ajax webmail client for existing IMAP mailservers...

    Open Source Web / Cloud

  • sSMTP

    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...

    Open Source Linux

  • Hectane icon


    An SMTP client that is extremely easy to configure and use, providing a simple HTTP API that is used for sending emails.

    Free Windows Linux

  • BulkMTA

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

    Commercial Mac Windows Linux

  • 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...

    Freemium Windows

  • Know any more alternatives to Microsoft SMTP Server?

    Suggest an application to this list

Microsoft SMTP Server Comments

Echo echo ... Feels empty in here

Maybe you want to be the first to submit a comment about Microsoft SMTP Server ? Just click the button up to your right!