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From: JCURRAN%UMASS.BITNET@WISCVM.ARPA
Newsgroups: net.mail.headers
Subject: extension fields
Message-ID: <467@brl-tgr.ARPA>
Date: Tue, 10-Dec-85 00:46:08 EST
Article-I.D.: brl-tgr.467
Posted: Tue Dec 10 00:46:08 1985
Date-Received: Wed, 11-Dec-85 21:26:26 EST
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I have seen several user-extension fields that lack the "X-" prefix
(making them simply extension-fields; subject to being redefined)
in hopes that other sites might employ them.

  Since some extension fields (user or other) involved the processing
of incoming mail, it only makes sense for a site which supports such
fields to inform others so that the incoming mail it recieves may
contain such information.  If, for example, a mail system supported
field yyyyy, how would/could it tell other mail system programmers
about it?  Is any agent maintaining a lists of'commonly used rfc822
extension fields?

-- John Curran
-- Umass/Amherst