You're right and I was wrong. The DKIM signer selects a list of headers (h=) to be signed, but the body is always implicitly included (and thus not listed). I

You're right and I was wrong. The DKIM signer selects a list of headers (h=) to be signed, but the body is always implicitly included (and thus not listed). I was confused because I thought there needed to be a flag to include it, and had never seen such from Gmail or others. For anyone else that's curious: https://rfc-editor.org/rfc/rfc6376#section-3.7 https://rfc-editor.org/rfc/rfc6376#section-3.7