Xref: utzoo comp.mail.sendmail:3109 comp.unix.ultrix:6977
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!ucsd!ucbvax!tut.cis.ohio-state.edu!ucunx1.san.uc.edu!rainwatr
From: rainwatr@ucunix.san.uc.edu (Don Rainwater)
Newsgroups: comp.mail.sendmail,vmsnet.mail.pmdf,comp.unix.ultrix
Subject: Problems with relaying email...
Message-ID: <1991Apr24.134148.24430@ucunx1.san.uc.edu>
Date: 24 Apr 91 13:41:48 GMT
Sender: rainwatr@ucunx1.san.uc.edu (Don Rainwater)
Reply-To: Don.Rainwater@UC.Edu
Organization: Univ. of Cincinnati
Lines: 23


	I'm having some problems with mail from my Ultrix 4.1 system.
Apparently, the headers aren't coming out quite right.  The "real" From:
header seems to be okay, since it comes out as username@ucunix.san.uc.edu
(as it should).  However, up above this in the headers is another line
that contains username@ucunix.  The name of this header line is called
either From or Return-path:, depending on the receiving machine.  When
it's a Return-path line, the address is enclosed in <>.

	For reasons of alias substitution, all mail from this Ultrix
system is forwarded (using a default relay definition in sendmail) to a
VMS system running PMDF, which then delivers the message to its
destination.  So mail travels from point A to point C via point B.

	The big problem is this:  Replying to one of these mail messages
from a machine that calls this user@simple-hostname construct a From
line is unsuccessful, since it tries to use this information instead of
the real (correct) From: line a few lines down.  There is no problem on
systems that treat this information (correctly?) as a Return-path: line,
since these systems use the real From: line instead.

	Anyone have any suggestions?  Is this a sendmail problem, a PMDF
problem, or something entirely different?  Thanks for any information.