Article View: comp.mail.misc
Article #4606Re: Do `%' and `!' imply (Data link layer) connectivity information?
From: John Owens
Date: Wed, 06 Jan 1988 17:43
Date: Wed, 06 Jan 1988 17:43
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The % sign in the local-part of an RFC-822 address can mean anything that
the domain wants it to mean. (It could even be part of a username.)
On most systems, something%somethingelse@this-domain means that the
mailer for this-domain should send the mail to whatever it would take
something@somethingelse to mean. If uunet wants user@host to imply
user@host.uucp, that's quite reasonable. On one system I configured,
user@host (or user%host@that-domain) meant that host in the local domain.
In sendmail's delivery ruleset (S0), I would route the hosts via the
appropriate protocol for each. Some would use UUCP, some SMTP, some
DECNET, etc.
In other words, it's all up to the destination. (and user%host is much
nicer than host!user because there's no ambiguity of left-vs-right
precedence).
-John Owens
Virginia Tech Communications Network Services
OWENSJ@VTVM1.BITNET owens@vtopus.cs.vt.edu
+1 703 961 7827 vtopus!owens
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!rutgers!cmcl2!brl-adm!umd5!uvaarpa!virginia!uvacs!edison!John From: owens@vtopus.CS.VT.EDU (John Owens) Newsgroups: comp.mail.misc,comp.mail.uucp Subject: Re: Do `%' and `!' imply (Data link layer) connectivity information? Summary: % is a local convention and can mean anything Message-ID: <1273@edison.GE.COM> Date: 6 Jan 88 17:43:18 GMT References: <5165@elroy.Jpl.Nasa.Gov> Sender: jso@edison.GE.COM Lines: 19