DKIM Record Checker
DKIM signs outgoing emails. Receivers verify the signature using a public key in DNS.
DKIM lives on <selector>._domainkey.<domain>. If selector is empty, we try common ones.
Result for about.com
Found
Selector: selector1
(TXT on selector1._domainkey.about.com)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCS9GcNVWcho8KrfEXX8kJNEmNDe6dSB+FMX/os0/FbSC2ChLWBqV04pP4bT50eHroTD4GwyvoAVuFJgOGo19UVkZeUwhqML3rSSm0ES/JXFE1dQvrQ024Km9UPSi9xxA73N1wyDoQVQrIyExJKh/cmwK23AQiHETBQhFHqBIUpMQIDAQAB; n=1024,1473675514,1
Selector: selector2
(TXT on selector2._domainkey.about.com)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCIi8OrTA9u/Yz5oV03oy4tzDBKmVNFhXRMdQNSP70in6GQnebpr1FkefCtzmom4fbvMgdt7dLHo1dPn60v6aEt6w57IPAiIbtdXoO1GmbrdDrsPJw5ykq8WRzdSiGXRGLgD+h3h4EX+Z0Gzkjr/r5brNrPcV41zmQeKRABlXlnJwIDAQAB;
FAQ
Why does DKIM require a selector?
Selectors allow rotating keys and running multiple keys per domain.
Where is DKIM published?
TXT on <selector>._domainkey.<domain>.
DKIM record exists but emails still fail DKIM?
Signing may be disabled or the selector used in email differs from DNS.
Do I need DKIM if I have SPF?
Yes, many providers use both for best deliverability and DMARC alignment.
Can I have multiple DKIM selectors?
Yes, that is common for key rotation or multiple senders.
What is DKIM?
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outgoing emails. DNS stores a public key that allows receivers to verify authenticity.
Example
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0B...
Common mistakes
- Wrong selector (the record exists but under a different selector).
- Key is split incorrectly across multiple TXT chunks (some DNS UIs break it).
- Publishing DKIM but not enabling signing on the mail provider.