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 transtradeltd.biz
Found
Selector: default
(TXT on default._domainkey.transtradeltd.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsBUQmJonoCdKl39C2mVQNhXnmm1+dPE7yG95M2BWrUk/whFih2ATUC7TGYFfGgWW49Q3Qnu+5PYplzJ/Ki6IA5EtQQEGPWuLb21s8gDHI4IyQMFPUSOxmQcG8uDHMocfVM3lxH7R3o5y767CpyIUs46QJII+egplKXsPWiBLnIQj2bGCsOYeNI17p8pRToiEIx9o8gLmcqwjWS4sD+2m6SzuJ4DW9NNVuBLXdrlH5Esg2+g9jV3OaIbiyh0Hue8L68bDsF14eKwuf7D8rEcyAcqks9fE/gpHF+z3nRUE2hPxHbe3H0AMRYLx9MAWC6gFtf+QoXJRZ0gslQztF+NNfwIDAQAB;
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.