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 casino.org
Found
Selector: default
(TXT on default._domainkey.casino.org)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA60PRfWNqY5YTmQh8FfGGA6HmTcgwIuSvYUOcboCfX2HxMgVfOXgK7f+ek/c5wgPatqbsDNU8zNEyEypDnyT0b8zcUP5CsCZuU94rEfrKqsPYrsEPH1y0/38Q0eLlyTyMDOdftOmxeGHUPh3EQIUEdEQweA7Q43NfCuq6RELf6ZiXG6yYoeIcu3cOz1xIhR/Yo xtElB5c1KWjiOhqPu5OpLOG5EUa6m7lHCEPFapYvN3K6XPpBYAIPGOIJqyezytrjXtdeuD41aM92Habr19xXY7K+udAW1rzkNz+iWBpLLwjohJBrKGCaIZvsS+mRUG1MgfhDhmGGyiLH81mismj9QIDAQAB;
Selector: selector1
(TXT on selector1._domainkey.casino.org)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyPF/wAt92rzSmy3TNhmErHpKQkA1eSkIy89HeAR6pKg4uz1NNcjgllqVd5d+dzIhUGEVo2L67uWtwlHJOs4ea/bVzKSw0gmaTGJBMJnUwiH82BIJgF5JsqATZ1QOqC+uggfIJSL87RZMx2yLyuQTlIJnsRPyDKozowpja3EIuBuGGRCZARy0hDfoEVfrXpaZTvZsZyo/tAqCd5B5c0WPFXLFo/6XwNBHC3vtLDNkjF9OWiAoFrIzIHYxbqxWEWBpRFZrr+8DJIWexsEPB3oo1I7cANXdW8SeZ+ZDEIcpzum3gKxluRZFDG2nFQ4XzdNrkO8aAdqxBmQs6+SSdNzZPQIDAQAB;
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.