Bill Cole:
> What is likely happening here is that when a milter sees a message, it
> does not have the current Received header, because it has yet to be
> fully received. If you are extracting this message from that stage
> rather than after final delivery, Postfix has not yet added the Received
> header. Milters work around this by adding a synthetic Received header
> when passing the message to SA, but if you save a message out of the
> milter, you won't get that.
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.
Postfix by default has "message_drop_headers = bcc, content-length,
resent-bcc, return-path", so those headers will not be exposed.
Maybe that belongs in the pickup daemon so that relayed or forwarded
messages won't be affected.
Wietse
