DKIM Record Lookup
Free DKIM lookup. Check any selector or probe 15 common selectors automatically, and grade key strength. Find your DKIM record in seconds, no login.
About the DKIM Record Lookup
Use this free DKIM lookup to find and validate your domain's DKIM record. DKIM adds a cryptographic signature to your mail so receivers can confirm it really came from you and was not altered in transit. Each sending platform uses its own selector - a name like google, selector1 or k1.
If you do not know your selector, leave the field blank and this tool probes 15 common selectors automatically. It grades the key strength it finds (2048-bit RSA is today's standard; 1024-bit keys are weak) and flags revoked keys.
Frequently asked questions
How do I find my DKIM selector?
Open any email you have sent and view its raw headers - the DKIM-Signature header contains s=, which is your selector. Or leave the selector blank here and the tool probes 15 common selectors automatically.
What is a good DKIM key length?
2048-bit RSA is the current best practice. 1024-bit keys are considered weak and Gmail recommends upgrading. This tool grades the key strength it finds.
Why is my DKIM failing?
Common causes are a revoked key (empty p= value), the wrong selector published, or the key on the sending side not matching the DNS record. This lookup shows the published key so you can compare.
Did this check reveal a problem?
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