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Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!harpo!decvax!ucbvax!ucdavis!lll-crg!gymble!umcp-cs!seismo!uwvax!dave
From: dave@uwvax.UUCP (Dave Cohrs)
Newsgroups: net.mail
Subject: Re: What's with the colons ... and other imponderables
Message-ID: <308@uwvax.UUCP>
Date: Sat, 14-Sep-85 15:47:34 EDT
Article-I.D.: uwvax.308
Posted: Sat Sep 14 15:47:34 1985
Date-Received: Tue, 17-Sep-85 05:30:39 EDT
References: <10263@ucbvax.ARPA> <263@mot.UUCP>
Organization: U of Wisconsin CS Dept
Lines: 24

> i recently received a msg from ..!seismo!decuac!decuac.UUCP!user
> and also ..!tove.ARPA!user instead of ..!user@tove.ARPA
> the former creations are unusable for returning mail.

Personally, I don't see why this affects your return mail.  If decuac
knows how to handle the address 'decuac!decuac.UUCP!user' and if
whichever site (seismo probably) that generated the '...!tove.ARPA!user'
can understand it (seismo can, I know), it shouldn't affect your return
mail UNLESS your mailer trys to be "smart" (read dumb) and not use the
route provided to it.

Mailers should *not* take addresses and chop them up.  What I
mean is, if you get mail from ...!seismo!decuac!decuac.UUCP!user you
shouldn't change this into decuac.UUCP!user and try to optimize the
routing.  If you do this, don't complain about the hostname.  Your
site wasn't meant to understand it, decuac was.  If your mailer insists
on editing routing info, then you should add the code to understand
all possible things people can and will do to their addresses.

-- 
Dave Cohrs
(608) 262-1204
...!{harvard,ihnp4,seismo,topaz}!uwvax!dave
dave@wisc-romano.arpa