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Path: utzoo!watmath!atbowler
From: atbowler@watmath.UUCP (Alan T. Bowler [SDG])
Newsgroups: net.mail
Subject: Re: Mail routing -- problems showing up
Message-ID: <16110@watmath.UUCP>
Date: Thu, 8-Aug-85 15:29:56 EDT
Article-I.D.: watmath.16110
Posted: Thu Aug  8 15:29:56 1985
Date-Received: Fri, 9-Aug-85 04:45:53 EDT
References: <3018@nsc.UUCP> <2875@topaz.ARPA> <4787@mit-eddie.UUCP>
Reply-To: atbowler@watmath.UUCP (Alan T. Bowler [SDG])
Distribution: net
Organization: U of Waterloo, Ontario
Lines: 21
Summary: 

All this discussion about domain addressing over source routing,
and "I want to explcitly route my messages with '!'",
is ignoring the fact that RFC822 does actually does have an explicit
routing syntax.
   The syntax is
   <@site1,@site2,@site3 : user@site>
The standard is unclear about wheither the routing list is interpreted
left to right, or right to left, but I presume you send to "site1" first.

   Parsing precedence can also be specified by use of the quoting
mechanism. e.g.
   "uucpsite!user"@gatesite.network
   (the message is routed automagically to "gatesite" which then
   attempts to parse "uucpsite!user" relative to its own rules.)

These potential capabilities seem to be ignored in all the  discussion.
Is this because:
  1) I am interpreting RFC822 incorrectly, and the capabilities are not there?
  2) SENDMAIL can't do either of these things, or no one has yet figured
     out how to make it do this?
  3) No one has ever written a full parser for RFC822 type addresses?