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DKIM Checker

Look up and validate DKIM public keys.

How it works

Look up a DKIM selector

Enter your domain and DKIM selector (from Google, Microsoft, Zoho, etc.) → we query selector._domainkey.domain for the public key.

Or start from a real-life example

Results appear here after you click Check DKIM.

Sending via API? MailShrine Developer API needs the same SPF / DKIM / DMARC setup as any other ESP.

Get Developer APISPF / DKIM / DMARC setup guideMore DNS & auth checkers