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 cashcows.biz
Found
Selector: default
(TXT on default._domainkey.cashcows.biz)
v=DKIM1; h=sha256; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2zjEyQ57ltR8XdymJJRhenykzWExS1X3N8SDqvQPSC9kJSm0jWUAhf+LOS4qC7GFAyyHtT9YL0iZI0MjgVWgVkjIbf0L1Wks7Jgsa8Zi0slF1TQBrGO5wb9AshR8rEtPflIRxsSrZ9nhnbqLXA21+KZllKbJY+nBkhWGH/u7ypUToV47YBXt0OFtQkzg4b9V6UVqhDQ2sOsihXrRSNiS1b1r1qWv7U0Bcz1aH17TZDjXYFiN+c1/QaNLzLeB3d2k8hDndnsFNtS493ooMH3gRowAb2TLgN1AHlIUbhZ6nq+lHCeF/J/RfzMmI4rnSHGnPpX34rofgeZh1EJgpeXVMQIDAQAB
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.