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 tradeboard.biz
Found
Selector: default
(TXT on default._domainkey.tradeboard.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApDxobUrWYQdxO25kuUTzELP1Q4Q8mn88XS1J1nLHkVTthdzE2Eou2ayRQsweBIpKRsJXlMEjOqKNTl+vG6Mzycpze01MALEJsiY9ty12PgQW1ouLFUNv4gLSfcasj50fxkoEUN2+qdn/Yr8+8ea7G6xO0wdhRErR1qiPxvvqqFfY+uz+aj/ppVTL6LaICkxY+Uu40ctSE2ig3qkoRlCV/ekHEuF9YdL4WwEym2ldaU2ECb+5Lb1VJfMgGj3IxI+dsske2gD1loqIlmpbbzoqL6Pn8MXAtWowYM0AWrhoIfsVlYe4dRq9hM+SGPqZjNwItHMNK7X1PXWpsMaFNawTUQIDAQAB;
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.