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 captain-art.com
Found
Selector: default
(TXT on default._domainkey.captain-art.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnNnvfGVNlSfQIt+HTmJ6vuzYE10oYU+AvqhCZ4fKkbo8NO1c6naZazxgkBaXuwzOIaTLdlfKhxkKAu2G6zwIXE6QbAbn40G0Oo32RLZm3isGI5uzzXcMdDbA9+nw9UEFNs/0GXiyhflMbO+eCgTIp0or6KB+YTMfFYhEXiOYy4G4IgCHTR4f8CrVCCDjka9SFpsMhtfG0hq6aGm1jdW6Ou8EauScjMzOU9IOnvSCedEVLCM5tpKcdHZR7vI3rHPTdXS8AiY1SUgvQ/d/H2fBJt6S1V3MEgkKqdcxdfNRUu1xWyKvmVSYy/gwWf5l56aFu4vih4ZGIdhYNA8/PdUY2wIDAQAB;
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.