DKIM Checker
DKIM adds a digital signature to your email. Send us one message and we'll check whether the signature is valid and belongs to the same domain as the From address.
Works with
What we check
dkim
DKIM is a digital signature. A pass means the signature is valid. It does not mean List-Unsubscribe or Feedback-ID were covered.
dkim_aligned
DKIM is a digital signature on the message. This row passes when the signature is valid and the signing domain matches the visible From address.
FAQ
Do I need to know my DKIM selector?
No. A selector is the name that points to the public key in DNS. We read it from the signature on the message you send.
What does a DKIM pass mean?
A pass means the digital signature is valid. The signed content was not altered after it was signed. Coverage of List-Unsubscribe or Feedback-ID is a different check on the report.
What does DKIM alignment mean?
Alignment means the signing domain and the visible From address share the same main domain. mail.example.com and example.com count as a match.