So technically integrity is assured from server to server, but not between clients and server.
Original Message From: Bill Cole Sent: Saturday, February 11, 2017 7:08 PM To: Postfix users Reply To: Postfix users Subject: Re: Why no List-ID header in the postfix-users posts? On 11 Feb 2017, at 21:53, [email protected] wrote: > Further, how does DKIM prove the message wasn't altered? To my > knowledge, SPF proves the message came from a qualified server and > DKIM proves the FQDN is a match. DKIM signs a hash of the canonicalized message body and the set of headers specified in the signature. Modify the body or any of those headers, the signature breaks.
