Xref: utzoo comp.mail.headers:406 comp.mail.misc:1273 comp.mail.sendmail:115 comp.mail.uucp:1975
Path: utzoo!utgpu!water!watmath!egisin
From: egisin@watmath.waterloo.edu (Eric Gisin)
Newsgroups: comp.mail.headers,comp.mail.misc,comp.mail.sendmail,comp.mail.uucp
Subject: Re: "Return-Receipt-To:" and Mail/mailx
Message-ID: <21154@watmath.waterloo.edu>
Date: 27 Sep 88 14:17:57 GMT
References: <511@mipseast.mips.COM> <3975@psuvax1.cs.psu.edu> <22535@tut.cis.ohio-state.edu>
Organization: U of Waterloo, Ontario
Lines: 10

The .mailcf hack was apparently removed from 4.3 bsd sendmail.
If your system has exec'able shell scripts, you can create
your own sendmail. This is my etc/sendmail --

#! /bin/sh
(cat <<.; cat) | /usr/lib/sendmail "$@"
From: (Eric Gisin) egisin @ math.Waterloo.EDU (U of Waterloo)
.

Then assign SENDMAIL=$HOME/etc/sendmail and export it from your .profile.