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 captainclearpoolservice.com
Found
Selector: default
(TXT on default._domainkey.captainclearpoolservice.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvWKsvuSWK+wegk/mAP/p48TxvlTqP/48Hk8Dpilp6IBpYgwtwL93H7psM9vrHdDjwFO4Jk0csnfgOj1/YQqoHj+tEPhOdKjzIoZQQjfe08tCS8/NPk9moVjweIwKU4MLFA8PlYAEccVH5KhucOGL+UlveLSx848VL1ad6Ee93UC/OLUixWZwKGgI6PqK3g4Pq5fRkYRkx1zMsFX4WLc/I07dH6waIIU1QSQGtvZeELi7hs6m02AnKVHZpkKVhn8GgZkzTEXn6KLtAM0Aex4uSkszIqK9vmp1VDvVvn3UBANcci/9W8U68QFG70WtDgPpLBVMPuDjir2VUkMi7qrxLQIDAQAB;
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.