Alternatives to mailosaur for all platforms with any license



Web / Online

  • FakeSMTP icon


    FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java. Configure your...

    Open Source Mac Windows Linux

  • smtp4dev icon


    Dummy SMTP server that sits in the system tray and does not deliver the received messages. The received messages can be quickly...

    Free Windows

  • MailCatcher icon


    MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set...

    Open Source Mac Windows Linux

  • 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...

    Free Windows

  • 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

  • MailHog icon


    MailHog is an email testing tool inspired by MailCatcher, but easier to install. - Configure your application to use MailHog for SMTP...

    Open Source Mac Windows Linux

  • 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...

    Free Web / Cloud

  • Papercut icon


    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...

    Open Source Windows

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