Software Alternatives & Reviews

Microsoft SMTP Server

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

Top 12 Open-Source Alternatives to Microsoft SMTP Server

OpenSMTPD Exim Inbucket Courier-MTA MailHog Mailtrap iRedMail Roundcube Mail-in-a-box Mailer

Summary

The top open-source alternatives to Microsoft SMTP Server are OpenSMTPD, Exim, and Inbucket. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.
  1. OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...
    Pricing:
    • Open Source

    #SMTP Server #Email #MTA 2 social mentions

  2. 2
    Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
    Pricing:
    • Open Source

    #SMTP Server #Email #MTA

  3. Inbucket is an email testing application; it will accept messages for any email address and make...
    Pricing:
    • Open Source

    #SMTP Server #Email #MTA 3 social mentions

  4. The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open...
    Pricing:
    • Open Source

    #SMTP Server #MTA #Email

  5. MailHog is an email testing tool inspired by MailCatcher, but easier to install.
    Pricing:
    • Open Source

    #Email #Office Suites #Email Testing

  6. Email Delivery Platform that delivers just in time.
 Great for businesses and individuals.
    Pricing:
    • Open Source
    • Freemium

    #Office Suites #Email #Email Testing 50 social mentions

  7. A fully fledged, free email server solution, an open source project (GPL v2).
    Pricing:
    • Open Source

    #Email #SMTP Server #Self-hosted Email 2 social mentions

  8. Web-based IMAP email client
    Pricing:
    • Open Source

    #Email #Email Clients #SMTP Server 16 social mentions

  9. 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.
    Pricing:
    • Open Source

    #Email #Self-hosted Email #Email Service Provider 115 social mentions

  10. 10
    Free utility to send emails from the command line. No Installation. All contained in one file.
    Pricing:
    • Open Source

    #Email Marketing #Email Marketing Platforms #Email

  11. 11
    Lightweight, cross-platform SMTP client
    Pricing:
    • Open Source

    #SMTP Server #Email #MTA

  12. SquirrelMail is a standards-based webmail package written in PHP.
    Pricing:
    • Open Source

    #Self-hosted Email #Enterprise Communication #Email 3 social mentions

Suggest an alternative
If you think we've missed something, please suggest an alternative to Microsoft SMTP Server.
Please use the Feedback button if you think any of the listed products shouldn't be regarded as open-source.

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