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 target.com
Found
Selector: selector1
(TXT on selector1._domainkey.target.com)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC0oiYF7buEzeuVwpsQ4oj55KJx2IYiGPsSKKn/q/4ko7LneFyO9+GduL9EpT5QXxZLJvwNasgdmVj0hen+2bQx5h7qfkzi/HVHC1ThBLQvjdD4e73UfGfeV0jvh6MGyo+vPKOlB7wTSLGbFW34sUAeNyH5dEf1G8r5H+zF8DyfFQIDAQAB; n=1024,1449878198,1465689398
Selector: selector2
(TXT on selector2._domainkey.target.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvqlJ41tMMK4t6IPQOuEmhmBwIyfxpFuB1TAXdsoskU2YuUgEWJwSRKZ3Y0urlv8kTIbR+geGhyiXBn7QC8Oxodv8tNKHJOH0DB1CJGeIout4yTFxhDof4EcXFVMueGK0FUjo/1aOBZuAQ535CArXaq74eFWmXZIaT+Koyj2SwO4oTbOy4E5HWUMgD5v06lZbq4mO4s1Ytd4JF3fyEtI1neE+h6j68DjLvv8LxC5g/6oXIrAZrx42zQFwgSmDk/eQXGgfIyyF/BA7zmI1TEpZmwjXBzbdxY7+aFEUgGEtjga0+qhOZHcwMcA9PfRfrvlTebIuEKpQoapUjDDPglta0QIDAQAB;
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.