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Path: utzoo!mnetor!seismo!husc6!think!ames!oliveb!pyramid!prls!philabs!micomvax!musocs!mcgill-vision!mouse
From: mouse@mcgill-vision.UUCP (der Mouse)
Newsgroups: comp.mail.uucp
Subject: Re: whether to prefix myhost! onto the From: or not..
Message-ID: <771@mcgill-vision.UUCP>
Date: Mon, 11-May-87 03:52:16 EDT
Article-I.D.: mcgill-v.771
Posted: Mon May 11 03:52:16 1987
Date-Received: Sat, 16-May-87 13:01:35 EDT
References: <16238@amdcad.AMD.COM> <600@vixie.UUCP> <870@xanth.UUCP> <603@vixie.UUCP>
Organization: McGill University, Montreal
Lines: 33

In article <603@vixie.UUCP>, paul@vixie.UUCP (Paul Vixie Esq) writes:
> In article <870@xanth.UUCP> kyle@xanth.UUCP (kyle jones) writes:
[stuff about host!user]
>> paul@vixie.uucp seems the best alternative.

> As others will no doubt point out, this is bad and evil.  [...] Many
> older sendmail.cf's use .UUCP as their mock domain for UUCP traffic
> -- so an address input as vixie.UUCP can cause confusion -- it
> becomes vixie.UUCP.UUCP internally, and after that, chaos.

Then it's even buggier than usual.  Most would produce vixie.uucp.uucp
only if you give vixie.uucp!paul, which I certainly hope nobody is
crazy enough to do (but see paragraph after next, as well).

If the host is running software so old that it can't live with
paul@vixie.uucp, it's best to admit that it's broken and either fix it
or live with and use vixie!paul.  If your machine is handing stuff to
another host, it should use something the other host can understand -
host!stuff for ancient hosts, user@x.y.z for intelligent machines.

Something that seems to be getting commoner is interpretation of
foo.bar!user as meaning the same thing as user@foo.bar - the .uucp gets
added only if there are no dots in the "host" part.  This allows two
intelligent hosts to speak to one another using a dumb !-only host as
their link.

What I shudder to see are things like netnews postings with messes like

From: user@host.dept.univ.edu.UUCP

					der Mouse

				(mouse@mcgill-vision.uucp)