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NewA free test that shows whether your emails will reach the inbox.

Free, no account

Check your domain's email setup

Type a domain and see, in a few seconds, whether its MX, SPF, DKIM and DMARC records are right, with one plain line on how to fix anything that is not.

What the check looks at.

Public DNS only, read live each time. Every row gets a pass, a warning or a fail, and anything not passing comes with the fix.

  • MX

    Receive

    Whether the domain can receive mail at all, and which servers it goes to, in priority order.

  • SPF

    Send

    That there is exactly one SPF record and that it ends in ~all or -all, so other servers cannot pass as you.

  • DMARC

    Protect

    The record at _dmarc and its policy: p=none only reports, quarantine and reject stop forged mail.

  • DKIM

    Sign

    Keys at the selectors common senders use, such as google, selector1 and selector2. A domain can use any name, so a miss is a warning.

  • BIMI

    Optional

    Whether a brand logo record is published for inboxes that show one.

  • MTA-STS and TLS-RPT

    Optional

    Whether senders are told to deliver over TLS only, and whether TLS failures are reported to you.

Records tell you what a domain allows. To see what receivers make of a real message, with its signatures, blocklists and spam score, send one to the email deliverability test.

New to the three records? SPF, DKIM and DMARC explained walks through each one with real examples, and the domains guide lists what Runearc publishes for you.