Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!cis.ohio-state.edu!karl_kleinpaste
From: karl_kleinpaste@cis.ohio-state.edu
Newsgroups: comp.mail.misc
Subject: Re: Which headers may Sendmail re-write?
Message-ID: <KARL.91Jan2085630@giza.cis.ohio-state.edu>
Date: 2 Jan 91 13:56:30 GMT
References: <277FE143.513F@tct.uucp>
Sender: news@tut.cis.ohio-state.edu
Organization: OSU
Lines: 6

chip@tct.uucp writes:
   Granted, a site that fits all E-Mail into the Procrustean bed of
   RFC822 may have to assume that "dom.ain!user" means "user@dom.ain" for
   mail arriving via UUCP.  (For example, Ohio State does so.)

Any site running smail 2.5 assumes that dom.ain!user == user@dom.ain.