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 08406.biz
Found
Selector: default
(TXT on default._domainkey.08406.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArH6D6jwwL4MttGlLXody5nAyR6CcINuXUPpBZkwCUlj4cWs5vPshqWfqECVvgeWd3ZBIj5t2FfELIWYKK59IUBzQ3BGtjJ1Rekcy5ucy6mSxhOwLYuvofPS+O9Na1A68X4Rw4J8nDTbgC1qWSo32tMrfcf4Hd6ceC7hh0UragV+PWHAsW/tZQ4nVJeIU9J7Wo351NnS1oOPWR9uEMqlBKWJUl7OMQ60rVZ8Lp6ATgu/v/v81T/H+diRZfYH2XiZbiIBHExB5co/zjeECD22FJY7hpLitGMBRin7WcrYffG+B/egoc4YtxuT3y4s/6GF4OUtuE5M+GZmYDxfP0Mb3iwIDAQAB;
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.