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Path: utzoo!linus!decvax!genrad!mit-eddie!godot!harvard!seismo!rochester!lee
From: lee@rochester.UUCP
Newsgroups: net.mail
Subject: parsing name!user@host
Message-ID: <17400001@rochester.UUCP>
Date: Tue, 30-Oct-84 20:44:00 EST
Article-I.D.: rocheste.17400001
Posted: Tue Oct 30 20:44:00 1984
Date-Received: Fri, 2-Nov-84 05:20:48 EST
Organization: U. of Rochester: Computer Science
Lines: 26
Nf-ID: #N:rochester:17400001:000:1314
Nf-From: rochester!lee    Oct 30 20:44:00 1984

On the question of how do you parse
	foo!bar@baz

I agree with the philosophy that UUCP only sites should give higher precedence
to "!" while internet only sites should give the "@" precedence.  For the
case where a site is both on the internet and UUCP nets, I would like
to resserect a solution I saw here sometime ago.  The idea was that precedence
should be disambiguated by the source of the message.  There are two cases:

the messages arrived via UUCP:
	In this case, precedence should be given to the "!".   Imagine
	the case of foo1!foo2!user@site.  If foo1 is on the internet,
	then currently it will either refuse to forward the message to
	the internet OR it will pass it to "site" which (hopefully)
	has a UUCP connection to foo2.  I do not know of any UUCP user
	that uses the internet as a way to pass mail between UUCP sites.
	It is just too tricky.

the messages arrive via the Internet or are locally generated:
	Since the site is already on the internet, there isn't a need
	to use UUCP to get the mail to an internet site.  Therefore
	user really want to get to a site that is hooked via UUCP
	to another internet site.  Give the "@" higher precedence.

Noticing the ability of users to define their own sendmail configuration
files it should be fairly easy to implement the above suggestion.