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 nightrush.com
Found
Selector: google
(TXT on google._domainkey.nightrush.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAh6n1psG2kqHvKb9JzXURomdgUThIz9FWrlf54Pw8boN9uhGYO4QxEw/q8mMl4pUIEKC3zg7l+GZgqFT2HzkzUjB6ldkpZOCSac5gDUXU+HCB0+CHA6dlc/sHWhTaTt12kFWSqt3nB952WXRiQcRVr1UYv/kkk3acbITR3ZlHdB4/7VrkSjkgTw6vviQeL3YR67siB5DeIrKkdvXGwbaZrLai4Cbs+wI62CTqkFbi1Z+fhkXe0EEpShi97L6Kg9tdm7zwTVD4H8oTQmzu6S5Q05VKGgF33U1E3tDNh1sDSu6BguRY72j2LfVLrHFXUGdwdsNZVdWlIVfGuk5cB7VwLQIDAQAB
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.