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 bet3000.com
Found
Selector: default
(TXT on default._domainkey.bet3000.com)
v=DKIM1; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxbFDgAimUCRTrzCIu6GHISybuJYyeAKsTXhM98jX65QsIHmwawQ4YecmnE5DA5Qn7UD8Qk2noe3TWXTroamg46WuULrl5koHaqCjNs9yPVNTdi2+zNswJ1qMgLqIGslXvWjAziXa8PZ9pMLM/yLmDfgtz4oaNhWoBgzmXU0nyJPMPFmBfVr3aTy6K7USOLr9jLC9aupsTs3kbB0wl4DWfLSYu/p4aDoUW9KVTF9bGW+c4n2w5v/E0nEbXepmjxa22xFLvnKQiQciu0yY0mOPBAQOdJkQP3Y2WqCMV5w+MhpdnCnNsK0I3+/vdCaxwS4vo2jDd14A9tpJz/ZeJmtDRQIDAQAB
Selector: dkim
(TXT on dkim._domainkey.bet3000.com)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJiFW0E3cRqgw20bEKT7ZIDbs6E8BR6WPKTofqpN9raugRFA2SQfgb2Mt7zWi5bURZjKIxMmcd2O9/hnqCL9bcaKJdsIzZSVjp179WdbQMiVCZDTcbId1POHSqhIe8riVPZJvx8o3F2VvIJ1CoV35YaFriid5A4C+b4mNggAkOoQIDAQAB
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.