Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!rutgers!seismo!sundc!hadron!jsdy
From: jsdy@hadron.UUCP
Newsgroups: comp.mail.headers
Subject: Re: Routing using @host1:@host2:user@host3
Message-ID: <450@hadron.UUCP>
Date: Thu, 5-Feb-87 21:21:39 EST
Article-I.D.: hadron.450
Posted: Thu Feb  5 21:21:39 1987
Date-Received: Sun, 8-Feb-87 01:53:42 EST
References: <4611@mit-eddie.MIT.EDU> <837@astrovax.UUCP> <1322@ncr-sd.UUCP>
Reply-To: jsdy@hadron.UUCP (Joseph S. D. Yao)
Organization: Hadron, Inc., Fairfax, VA
Lines: 24
Summary: Comments on sendmail & Doug K's "phrase"

In article <1322@ncr-sd.UUCP> matt@ncr-sd.UUCP (Matt Costello) writes:
>	@host1:@host2:user@host3	# 1
>	@host1,@host2:user@host3	# 2
>I've noticed that sendmail sites tend to use form #1, ...

Clarification: a route may only be used inside <>'s, but is not
needed.  The "phrase" bit is to allow:
	Joseph S. D. Yao <jsdy@hadron.COM>
type addresses.  The "phrase" can be null:
	<@brl,@seismo:jsdy@hadron.COM>

Sendmail (on 4.2BSD and Ultrix 1.0 and 1.1) is supposed to respect
the quoting power of <>'s.  Actually, tests show that it respects
the separating power of commas more.  Therefore, the above legal
address gets turned into two illegal addresses:
	<@brl	,	@seismo:jsdy@hadron.COM>

As with some other not-quite-legalisms, sendmail uses the @...:@...:
form as input, and on output translates to @...,@...: (or should ...
it did and does on machines for which I've tuned sendmail.cf).
-- 

	Joe Yao		hadron!jsdy@seismo.{CSS.GOV,ARPA,UUCP}
			jsdy@hadron.COM (not yet domainised)