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AUTHENTICATION / SKY FREE TOOLS

DKIM Checker

Check the public DKIM key for a selector you know, including key structure and strength.

01 / INPUT

Is the signing key published correctly?

STEP 01
Use the d= signing domain, not a full URL.
Read s= in a DKIM-Signature header or your provider setup.

This check reads public DNS through Sky’s fixed resolver. It does not receive a message or change a record.

Your DNS query is sent to Sky’s server and its fixed public resolver to complete the lookup. It is not added to tool history. Ordinary hosting access logs may still exist.

NEXT / INTERPRET THE EVIDENCE

Use this result with the sending path, receiver response and authorized provider signals—not as a stand-alone placement verdict.

Explore the Signal Lab