Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!ncar!midway!gargoyle!chinet!les
From: les@chinet.chi.il.us (Leslie Mikesell)
Newsgroups: comp.mail.misc
Subject: Re: Which headers may Sendmail re-write?
Message-ID: <1990Dec21.190110.29495@chinet.chi.il.us>
Date: 21 Dec 90 19:01:10 GMT
References: <1990Dec18.071226.20809@chinet.chi.il.us> <1990Dec18.155353.5024@mp.cs.niu.edu> <1990Dec19.154652.11573@sceard.Sceard.COM>
Organization: Chinet - Public Access UNIX
Lines: 27

In article <1990Dec19.154652.11573@sceard.Sceard.COM> mrm@Sceard.COM (M.R.Murphy) writes:

>Prepend node! to the "From ", not to the "From: ". Don't mung valid RFC822
>addresses. Bounce invalid RFC822 addresses if you feel like it. I think that it
>is a service and a long term favor to do so. Or let the site that doesn't
>understand the address bounce the message. Don't rewrite RFC822 addresses based
>on transport. That way prepending 'node!' doesn't massacre the address at all,
>since it isn't prepended.

In mail from mrm@Sceard.COM I received a copy of the headers from a message
I had sent to him earlier.  I know that the From: line left chinet looking
like:  From: les@chinet.chi.il.us (Leslie Mikesell)

What he got was: 
 From: Leslie Mikesell <ucsd!gargoyle.uchicago.edu!chinet.chi.il.us!les>

Are we having fun yet?  

>If it ends up being a real problem, and the communication is life or death, then
>there is always the telephone, which can be used to communicate to set up a
>direct mail connection :-)

Not always - you may want to mail to a site where modems aren't available
(or allowed) or you may have no common communications protocol.

Les Mikesell
  les@chinet.chi.il.us