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 2heads.biz
Found
Selector: dkim
(TXT on dkim._domainkey.2heads.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAx3p1m2jH1G6e8RJU8+vahh89iQFAho9Q5gO90HXMtJzelzelfE9JNrxXMmyY5yxZ4eF99M/eepU8xkVjiUts2xidZhJTS1GEHxLkHgtJEeE/jxQpJL9rZ8vobv6opThdq4jF2/cFqZrG/R8267HmPEouUsaZ4CQYzBJn62TuU507aEkpcdcRFhvQ7Q7i4HUOc6XU7LbypdUaVYpZMhNqchDhYVXbGvzFBqEUc3IPFX74dEFxuPHrYes+d0RPnpSVt3yeApxjI8cVM4Yv2P/lJcZGwSO6iVc9GNRgogl8Kcram3QpACFdCt7KArdw+ghkKS5r90/+waw02yV/o76qBwIDAQAB
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.