Alternatives to MxToolBox for Windows with any license

  • SPF Toolbox

    SPFtoolbox is an Open Source Javascript and PHP app to look up DNS records such as SPF, MX, Whois, and more.

    Free Open Source Mac Windows Linux Web Chrome OS ... Self-Hosted

    SPF Toolbox icon
  • SMTP Diag Tool

    SMTP Diag Tool is used to identify and troubleshoot SMTP server problems by trying to send a message to an SMTP server while displaying all diagnostic information in...

    Free Windows

    No features added Add a feature

    SMTP Diag Tool icon
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