Software Alternatives & Reviews


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

OpenSMTPD Alternatives

The best OpenSMTPD alternatives based on verified products, community votes, reviews and other factors.
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  1. 25

    Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

  2. 18

    sSMTP is a simple MTA to deliver mail from a computer to a mail server.

  3. Warm up your cold email inbox, and never land in spam anymore!

    Try for free freemium $9.0 / Monthly

  4. 18

    Sendmail is a general purpose internetwork email routing facility that supports many kinds of...

  5. 19

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

  6. 11

    msmtp is an SMTP client.

  7. Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

  8. A fully fledged, free email server solution, an open source project (GPL v2).

  9. 12

    Configure SMTP e-mail in IIS when you want to deliver e-mail messages from your site.

  10. Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

  11. Open source SMTP server written in Node.js

  12. A small Mail Transport Agent (MTA), designed for home and office use. Part of ...

  13. Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

  14. esmtp is a user configurable relay-only Mail Transfer Agent (MTA) with a sendmail compatible syntax.

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OpenSMTPD Reviews

External sources with reviews and comparisons of OpenSMTPD

Best Free and Open Source Alternatives to Microsoft Exchange Server
OpenSMTPD is an implementation of the server-side SMTP protocol, with some additional standard extensions. Its design goals include security, reliability, ease of configuration, and support for common use cases.
Read all OpenSMTPD reviews →

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Author: | Publisher: SaaSHub
Categories: SMTP Server, Email, MTA


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