Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!munnari.oz.au!uhccux!waikato!comp.vuw.ac.nz!actrix!paul
From: paul@actrix.co.nz (Paul Gillingwater)
Newsgroups: comp.mail.elm
Subject: Re: Multiple mail users sharing one user code
Message-ID: <1990Nov15.184834.13600@actrix.co.nz>
Date: 15 Nov 90 18:48:34 GMT
References: <1990Nov12.092146.20233@actrix.co.nz> <1990Nov14.185038.18876@chinet.chi.il.us>
Organization: Actrix Information Exchange, Wellington, New Zealand
Lines: 63
Comment-To: les@chinet.chi.il.us

In article <1990Nov14.185038.18876@chinet.chi.il.us> les@chinet.chi.il.us (Leslie Mikesell) writes:
> >I'm trying to set up elm to be used under a bbs.  All users login as
> >bbs, so this is their euid.  The bbs software exports
> >LOGNAME=Paul.Gillingwater into the environment, and sets
> >MAIL=/apc/usr/Paul/Gillingwater/mail as well.
> 
> >The problem is that I want the From: line on messages to read:
> 
> >From: Paul.Gillingwater@bbs.actrix.co.nz
> 
> >Unfortunately, they come out as:
> 
> >From: bbs@actrix.co.nz
> 
> >Can anyone suggest a way to hack on elm to make this happen?  Of
> >course it should only fake the domain for bbs users.
> 
> You must have had to hack on your mailer transport to make it do
> the delivery for the bbs users.  Why not add the equivalent hacks
> to supply the From: line in the MTA based on something in the
> environment and simply configure ELM to leave off the From: line?

I've fixed it now.  I've added a patch to elm that checks the user
name, and if it's "bbs", it calls a different mailer, which tosses
the mail to rmail to make it appear to be coming from a sub-domain.
Here's the shell script I used:

: # /bin/sh
# This script is used by the XBBS program to pretend that it's
# living in a domain of its own.
# It is called with args which will be passed on to rmail,
# which will then pass it on to sendmail.
# 
# The first argument is the pathname to the message file.
# The second argument will be the name of the user by whom
# the mail is being sent.  Neither will be passed on.
MESSAGEFILE=$1
USERNAME=$2
shift 4
echo "From ${USERNAME}@bbs.actrix.gen.nz \(${USERNAME}\)" `date` >/tmp/bbs$$
# Append the message file to the fake From_ line
cat ${MESSAGEFILE} >>/tmp/bbs$$
rm -f ${MESSAGEFILE}
/bin/rmail $@ </tmp/bbs$$
rm -f /tmp/bbs$$
> 
> This will localize the changes and make it easier to undo should
> you decide to provide something closer to a normal unix environment
> in the future.

I'll be providing both.  Standard subscribers will get mail from
within the BBS, while users who pay extra will get full shell access
and "proper" mail.

> If you are using smail 3.1, the changes would be trivial - I have
> a modification that makes it emulate the SysV use of LOGNAME for
> the From_ (and From: if it doesn't already exist), in case you
> want that as a starting point.

Thanks, but I'm using sendmail.  It all seems to be working fine
now.  I can also post the mail delivery program if anyone wants it.
-- 
Paul Gillingwater, paul@actrix.co.nz