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 constructiontrades.biz
Found
Selector: selector1
(TXT on selector1._domainkey.constructiontrades.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtfkYbUU98ZyinPnDyu6QH+RybF2WlfZ2jCOc3Zz0ZfJpPi0XE4hCu73Bgi9etBxwtfe0r+NXeu88s9xKn8C46fNzw6+1DbBMGkeaVOXVT1JDr+moPzZ7ehs4UI3s6GilD6HVF5fwbbsNj5LAWbojPRRpNAqq8OJguNy598505V4cgvtA/Zc0s90HdB2LzayqCaq0Dc4rGu0J6GShh1QXg/6NH3Ps4abj12VT8FiR7GUUkBDL64SUvqhT8m6jHaavER2F683VDxa0BnQhDI+KfSdfsJ18lHExjh2ahayDz7OD3kb2PvZNwQHQn7gjETtucDVn+DA6MavVZ/duq89OEQIDAQAB;
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.