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 luckyniki.com
Found
Selector: selector1
(TXT on selector1._domainkey.luckyniki.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwfmZCaR7W1nmcUCVjRHaluE7AfgLGG+t4svodwp+RZkAfVK2OiSEzO3kEpPdRNywx6ppm9Xx40u7AefdiztVKR9r0e0oSYuU04q5YVk9i6KnkwwSbO5CgNe/8eiukPTD0PsNeYBdKv9rT9sa55hRsxViTBeKEXlQA4ZEV8AVjZXlUEW9K/1A2i/jVMyiSQGWRBtME/T+qCC8bI2zPVu7zajJewiFwIYtGHj3yET0K28+bVubOv86rURuOfQDA2Wh0UZd/M+PvW9n7hUurOitnQlh6a0h4S78raFrlBSrIlZ8yiwOa0nMCsHseFj+43hwZOkFqTyDj6zNPRu24K9RVQIDAQAB;
Selector: mail
(TXT on mail._domainkey.luckyniki.com)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCXFjTXeZzBhIizlGtMG6v4BO9tBh2MqMjKCbrZnOdVtHFPGHmErExQuy9COtuYskdn5l5D6KRmmr8VgI1/LTYRtmPAuskxxqTjB7NOK4HX6uu3fS+4rsPgE03LmrcHob0AclIKxqujI8dPfpdUvvLUquoKGXOCOqQ9gFTej/z7LQIDAQAB
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.