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 123rf.com
Found
Selector: google
(TXT on google._domainkey.123rf.com)
v=DKIM1; k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAgt7zsA73IXx5RFPnkyU8psnTaL3nlgT91wmQnx85gQCRxx+gBN1UUkrOTVDqCRwZBuT7oZ+cjdTMCFyjCEw+EAN9O++OcMN4VD7AeSBPoPh6mFr+LLRitvaiSxmCCIHBvuT23oRxkMA3SN/sX5GyV1y16ktR2iG6ab0iXlgi6TsOHL+PG2y/v4nfHi9/Py0RP1sUzFDpBPn4shEXOrjHNSMlTdu5BnogdT5FUZscK8zMTDxtfqczwiCBQXn6PllTtIzqj+nr9pdpObqJIpNYPLwDkloKWEWy0iK6gvHRDA95yvo+MzXeC2r4aveL9fyLwQ4UOBRKMiQ9+EKM/8cH9QIDAQAB
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.