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 catcasino.cloud
Found
Selector: default
(TXT on default._domainkey.catcasino.cloud)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3AiWOMX/YDQ/CUW+fcY12MGWR6/7hzQD256N+x87NyeGxmkAZIgiN4CEi/GokgTUkXdyA1CRUAfy+8P4h0piNgHOF8ree/usnNxbaLGdGtKcl1vp+tpwVM+Npal9v4xy+CNx2SLHqXn86aMM+0zxTpP3GMSaFoHq8IfuBsOYDEheWJmlYhsyIwvbEzldameSuh2YPWQiN+T6ygey4T2Fst176m9f3HWQ+lBpRXVCtgdrDmQC3A6pgb5QEGNdo/m0GbEtxsfKUYB1PfQyAlPOyKvSD0AoUH9l+hvDimM2ECk6cADxXKMxKrU03fCF97JDr9uCbpPaT34kp0ii1cWpxQIDAQAB
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.