Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!nrl-cmf!mailrus!tut.cis.ohio-state.edu!bloom-beacon!mit-eddie!bbn!bbn.com!rsalz
From: rsalz@bbn.com (Rich Salz)
Newsgroups: comp.mail.headers
Subject: Re: routes vs addresses (was Re: ! and @ -- which RFC ?)
Message-ID: <603@fig.bbn.com>
Date: 7 Apr 88 13:59:02 GMT
Distribution: na
Organization: BBN Laboratories, Cambridge MA
Lines: 27

] Killer has no link to uunet, and uunet!epimass.epi.com!jbuck works so
] u!e!j must be an address.
Nope.  The agent that created that address is telling killer give this
to uunet, with info so uunet will give it to jbuck.  Your machine is
smart enough to know how to get there, but there is no requirement
that all machine be so smart.  Is cca!pineapple!rsalz a route or
an address?  It's an address, because it all depends on where you're
coming from.  To most folks "cca" will be cca.cca.com; however we
have a bbn.cca.com ...

If there is more than one ! in a path, it's a route.  If it were an
address, then people would not be getting upset at Rutgers for
modifying them, right?

>classify the following as route or address.
>jbuck%epimass.epi.com@uunet.uu.net
This is an address of the form "local-part@uunet.uu.net" the "%" hack is
nowhere defined.  Also, you're confusing things because epimass has
a direct uunet link.  Is "rs%mirror.uucp@harvard.harvard.edu" a route
or an address?  There never was a mirror<->harvard UUCP link.  (The
question's rhetorical:  it's an address.)

>@uunet.uu.net:jbuck@epimass.epi.com
This is an RFC822 route.

	/r$
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