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Re: Number of occurrences of headers

To: "Usefor WG" <ietf-usefor@xxxxxxx>
Subject: Re: Number of occurrences of headers
From: Russ Allbery <rra@xxxxxxxxxxxx>
Date: Wed, 23 Dec 2009 11:13:39 -0800
In-reply-to: <> ("Julien =?utf-8?q?=C3=89LIE=22's?= message of "Wed, 23 Dec 2009 17:25:06 +0100")
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Julien ÉLIE <julien@xxxxxxxxxxxxxxx> 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@xxxxxxxxxxxx)             <http://www.eyrie.org/~eagle/>

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References:
- Number of occurrences of headers
  - From: Julien ÉLIE

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