Re: Number of occurrences of headers

Russ Allbery <rra@stanford.edu> Wed, 23 December 2009 19:15 UTC

Return-Path: <owner-ietf-usefor@mail.imc.org>
X-Original-To: ietfarch-usefor-archive@core3.amsl.com
Delivered-To: ietfarch-usefor-archive@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 667CD3A6866 for <ietfarch-usefor-archive@core3.amsl.com>; Wed, 23 Dec 2009 11:15:35 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.645
X-Spam-Level:
X-Spam-Status: No, score=-4.645 tagged_above=-999 required=5 tests=[AWL=1.401, BAYES_00=-2.599, HELO_MISMATCH_COM=0.553, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QG6pJ0NSZ8dJ for <ietfarch-usefor-archive@core3.amsl.com>; Wed, 23 Dec 2009 11:15:34 -0800 (PST)
Received: from balder-227.proper.com (Balder-227.Proper.COM [192.245.12.227]) by core3.amsl.com (Postfix) with ESMTP id 550753A685E for <usefor-archive@ietf.org>; Wed, 23 Dec 2009 11:15:21 -0800 (PST)
Received: from balder-227.proper.com (localhost [127.0.0.1]) by balder-227.proper.com (8.14.2/8.14.2) with ESMTP id nBNJDgwK084814 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 23 Dec 2009 12:13:42 -0700 (MST) (envelope-from owner-ietf-usefor@mail.imc.org)
Received: (from majordom@localhost) by balder-227.proper.com (8.14.2/8.13.5/Submit) id nBNJDgVg084813; Wed, 23 Dec 2009 12:13:42 -0700 (MST) (envelope-from owner-ietf-usefor@mail.imc.org)
X-Authentication-Warning: balder-227.proper.com: majordom set sender to owner-ietf-usefor@mail.imc.org using -f
Received: from smtp.stanford.edu (smtp2.Stanford.EDU [171.67.219.82]) by balder-227.proper.com (8.14.2/8.14.2) with ESMTP id nBNJDeDZ084807 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for <ietf-usefor@imc.org>; Wed, 23 Dec 2009 12:13:41 -0700 (MST) (envelope-from eagle@windlord.stanford.edu)
Received: from smtp.stanford.edu (localhost.localdomain [127.0.0.1]) by localhost (Postfix) with SMTP id 3E204170D62 for <ietf-usefor@imc.org>; Wed, 23 Dec 2009 11:13:40 -0800 (PST)
Received: from windlord.stanford.edu (windlord.Stanford.EDU [171.67.225.134]) by smtp.stanford.edu (Postfix) with ESMTP id D03DB170D3E for <ietf-usefor@imc.org>; Wed, 23 Dec 2009 11:13:39 -0800 (PST)
Received: by windlord.stanford.edu (Postfix, from userid 1000) id CA19B2F5B9; Wed, 23 Dec 2009 11:13:39 -0800 (PST)
From: Russ Allbery <rra@stanford.edu>
To: Usefor WG <ietf-usefor@imc.org>
Subject: Re: Number of occurrences of headers
In-Reply-To: <F860E176B5CC4BA8A7BC475A7502604B@Iulius> ("Julien ÉLIE"'s message of "Wed, 23 Dec 2009 17:25:06 +0100")
Organization: The Eyrie
References: <F860E176B5CC4BA8A7BC475A7502604B@Iulius>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)
Date: Wed, 23 Dec 2009 11:13:39 -0800
Message-ID: <87r5ql4i70.fsf@windlord.stanford.edu>
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
Sender: owner-ietf-usefor@mail.imc.org
Precedence: bulk
List-Archive: <http://www.imc.org/ietf-usefor/mail-archive/>
List-Unsubscribe: <mailto:ietf-usefor-request@imc.org?body=unsubscribe>
List-ID: <ietf-usefor.imc.org>

Julien ÉLIE <julien@trigofacile.com> writes:

> I am currently adding support for the new header fields defined in RFC 5536
> and 5537 in INN.

> As far as I understand, every field defined in these RFCs can be used 0
> or 1 time in an article, except for Comments: and Original-Sender:
> which can be used an unlimited number of times.

I haven't checked RFC 5322 for the headers defined there, but that sounds
right.

> Regarding Original-Sender:, isn't one time enough?

Normally, yes, but it wouldn't be in pathological gatewaying situations
where an article was gatewayed multiple times.

-- 
Russ Allbery (rra@stanford.edu)             <http://www.eyrie.org/~eagle/>