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 1-800-contac.biz
Found
Selector: selector1
(TXT on selector1._domainkey.1-800-contac.biz)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC/5Qy3szt9l0qUA20Y8frOE6+d8F81nLr23hoIr7zqnrM3M1jCw+RO2A+4xlqS9sb8vJXRnLnSr/VT09U+06DY5nl4R9AO8JnMOlJL5nx7NFP14swi/phO9CkC2EQSGIsymVSF45/b3NePIcJazabjvJAtC9GEnVeaU5jOl7TgIwIDAQAB; n=1024,1462114571,1
Selector: selector2
(TXT on selector2._domainkey.1-800-contac.biz)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDNBrkh/bPW1S4oCvlN3SKzO4PANLmvw4OL+2Wu7HzoYImC+EF+ckxtySZ8i1Q5P28nrIBWFr73ex1aiG4FvSGhx413Wc+EaaUUbz+HBdcrJYCO1m4s8y3sV6sZkteY/EN8p7A1xM+YKtnm9NwSddOQHfZe2POI7XCH4/tqHT6f/wIDAQAB; n=1024,1462114571,1
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.