Alternatives to mailosaur for all platforms with any license

Platforms

Desktop

Web / Online

  • FakeSMTP icon

    FakeSMTP

    FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java. Configure your application to use "localhost" as your SMTP server, and all emails will be intercepted and...

    Open Source Mac Windows Linux

    No features added Add a feature
  • smtp4dev icon

    smtp4dev

    Dummy SMTP server that sits in the system tray and does not deliver the received messages. The received messages can be quickly viewed, saved and the source/structure inspected. Useful for testing/debugging software that generates...

    Free Windows

    No features added Add a feature
  • MailCatcher icon

    MailCatcher

    MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then...

    Open Source Mac Windows Linux

    No features added Add a feature
  • Own Smtp Server icon

    Own Smtp Server

    Own SMTP Server is a SMTP server for Windows that lets you send email messages directly from your system. It's very simple but very useful you can use it instead of ISP's SMTP server to increase your security and privacy.

    Free Windows

    No features added Add a feature
  • Papercut icon

    Papercut

    Papercut is a simplified SMTP server designed to only receive messages (not to send them on) with a GUI on top of it allowing you to see the messages it receives.

    Open Source Windows

    No features added Add a feature
  • Debug Mail icon

    Debug Mail

    Debug Mail is a mail server for testing applications and websites without need to set up an SMTP server.

    Free Web / Cloud

    No features added Add a feature
  • MailHog icon

    MailHog

    MailHog is an email testing tool inspired by MailCatcher, but easier to install. - Configure your application to use MailHog for SMTP delivery - View emails in the web UI, or through JSON API - Release messages to real SMTP servers...

    Open Source Mac Windows Linux

    No features added Add a feature
  • SMTP Bucket

    A fake SMTP server for e-mail integration testing. We capture all the e-mails we receive and make them available via our website and REST API.

    Free Web / Cloud

    No features added Add a feature

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