On Sat, Jan 21, 2023 at 02:49:34PM -0500, Wietse Venema wrote: > Correction: the MTA<==>Milter protocol hides the Received: header > that is prepended by the MTA, but it exposes headers that are already > present. That's what Sendmail does, and therefore Postfix, too.
Not only does Sendmail do this, it actually makes sense. The milter
logically sits **between** the remote sender and the receiving MTA.
Headers that are added by the local MTA are downstream of milter
processing.
--
Viktor.
