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From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.mail.misc
Subject: Re: address writing by gateways
Message-ID: <7679@mimsy.UUCP>
Date: Fri, 24-Jul-87 14:29:50 EDT
Article-I.D.: mimsy.7679
Posted: Fri Jul 24 14:29:50 1987
Date-Received: Sat, 25-Jul-87 15:40:32 EDT
References: <684@vixie.UUCP> <8120005@hpfclp.HP.COM> <715@vixie.UUCP> <1130@bloom-beacon.MIT.EDU>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 42

>In article <715@vixie.UUCP> paul@vixie.UUCP (Paul Vixie Esq) writes:
>>It seems unnecessary, since nobody needs to reply to anyone in the middle of
>>a route -- just the first.  The others are relative.  If they all have to be
>>registered, then one assumes that every host will know how to get mail to 
>>them, and wouldn't need route-addrs.

(This makes sense.  An example:

	<@athena.mit.edu,@hiddengate,user@hiddenhost>

The sending mailer need only be able to figure out the part between `<'
and `,'; the fact that `hiddengate' and `hiddenhost' are not registered
does not have to matter.  Despite this, RFCnnn [fill in the n's] says
it does.)

In article <1130@bloom-beacon.MIT.EDU> ambar@athena.mit.edu (Jean Marie
Diaz) writes:
>Well, in the Arpanet world at least, that's a nice theory.  But quite
>often these days, the ONLY way for me to get mail to a given machine on
>the west coast is to route through ucbvax:
>
>foo%decwrl.dec.com@ucbvax.berkeley.edu

But since decwrl.dec.com *is* a registered domain name, you could use

	<@ucbvax.berkeley.edu:foo@decwrl.dec.com>

>This isn't a matter of us not "knowing" decwrl....

If you were sending to an unregistered host,

	<@berkeley.edu:him@bouncy.ucb-test>

would be officially illegal.  Nonetheless it would probably work.
The string

	him%bouncy.ucb-test@berkeley.edu

would be legal.  Why, then, is the  version illegal?
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
Domain:	chris@mimsy.umd.edu	Path:	seismo!mimsy!chris