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 btcorps.biz
Found
Selector: dkim
(TXT on dkim._domainkey.btcorps.biz)
v=DKIM1; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoyWdb6acC1E8yHm8WV8vj/94SYmwnzpT/MY9ctzIuSXko+GqJwpo0PPN5QNfdBpxXG16TvWqY5wwafiQvZ8Z7qxRHUIzO1Vw/OmxcYOCcgSAM3FvNAzY2EjoPDxDiFw+ZK5BtR8hf4yR/Hgh6kmIQYvDsS1pge4+EJGdroE1bso+r7HIFgLtNO3uuWe8tv8My6JV+iyjjn/I6oRRx9zW1ZnIpgd6i+GSNvxQLM5KLPZsQChvozfEShP/NCRVaK1FaKn0P12mm+ahwM6qZGU7/pTzbzkqvYLpzCh45wONtWrEJLci4UaqN84Dv4aJi3Ld7fFEFGeqpSvmkInNtRMmzwIDAQAB
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.