DKIM finding

DKIM body hash mismatch

The body hash in the DKIM signature does not match the actual message body. Something changed the content after it was signed.

Finding code

dkim_body_hash_mismatch

This finding appears in the findings array of the spam checker and the POST /v1/sender API response when the condition above is detected.

How to fix it

The fix.

Something changed the message body after it was signed. Common causes: a mailing list that appends a footer, an antivirus gateway, or a forwarding rule that modifies content. Sign after the last transformation, not before.

Related DKIM findings

Other things we check.

Finding What it means
dkim_missing No DKIM signature
dkim_signature_invalid Invalid DKIM signature
dkim_key_not_found DKIM public key not found
dkim_weak_key Weak DKIM key
dkim_alignment_fail DKIM alignment failure