DKIM checker

Check DKIM public key records by selector and domain.

DKIM DNS Authentication Guide

What does a DKIM checker validate?

It reads selector._domainkey DNS TXT records and verifies that a DKIM public key is published for message signature validation.

Where do I find my DKIM selector?

The selector is configured by your mail platform and appears in DKIM-Signature headers as s=selector.

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