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 coolcatcasino.bet
Found
Selector: default
(TXT on default._domainkey.coolcatcasino.bet)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAozVywJjIg2LAkxKCNA0RMaiB6GcvJQJ3A0I2sfGS5x1dF2oep56mDuKDmtWihBgKdPPHTyTU6M5hRIo983dv046MPRB2JmbJMq/2Lps4sHzTONBwcExcOPbx194Bqm4B5rG469116FHnmT+s1HbGYWrA2hMGo6NYaM/ECW7IaHEPtR3/H4nHRk/wa2s3x40zFWOyAEaBRj7I6a0tc5Oe+ZJGEpwb2IrYlpVZ2MP9BPoCnBBMAhrzFAD08JIxBA9RvV3CS/jVHbsHgp4J1mrdWJ3SKhT2Tre7/7Omw8/gmBN0xLJ6aCjtyO+ySXd66LVQ4cTSBKHTukJTpf/kBXOsaQIDAQAB;
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.