[Pkg-mailman-hackers] Bug#346413: mailman: news gateway breaks threading

[Ian Zimmerman]

Package: mailman
Version: 2.1.5-1
Severity: normal
Tags: upstream

The mailman mail-to-news gateway changes the Message-Id to one different from
the received mail --- or perhaps doesn't set it at all, which means the news inject
mechanism will insert a different one.  This has the effect of breaking threads in
pairs of connected newsgroups <-> mailing lists.

Note that there is no way to avoid this ill effect by reading the group either as
news or mail.  If you read as mail, then replies by news to articles posted by mail
will break the thread; if you read as news, then replies by mail to articles posted
by mail will break the thread.

As an example, compare these two sets of headers for the same message.
The first is copied from the Google archive for gnu.emacs.help; the second is from
the copy of the message I posted through help-gnu-emacs at gnu.org:

>>> header, news version

Path: g2news1.google.com!news1.google.com!news4.google.com!newsfeed.stanford.edu!shelby.stanford.edu!not-for-mail
From: Ian Zimmerman <nobrow... at gmail.com>
Newsgroups: gnu.emacs.help
Subject: Re: emacs-snapshot keybinding problem
Date: Thu, 05 Jan 2006 21:08:19 -0800 (PST)
Lines: 12
Approved: help-gnu-em... at gnu.org
Message-ID: <mailman.55.1136524212.26925.help-gnu-emacs at gnu.org>
References: <mailman.20812.1135883611.20277.help-gnu-emacs at gnu.org>
	<87zmmjyz2z.fsf-monnier+gnu.emacs.help at gnu.org>
	<8764p6u0mp.fsf at magma.ca> <89094436dbe19fc651e2bc3fd10bfcce at Web.DE>
	<87y822sagk.fsf at magma.ca> <3c110c9e9c722c8b8843bee0bea47a2f at Web.DE>
	<87hd8p5l5p.fsf at magma.ca> <9bc9d7eb4441de7f9ae098a8cf925706 at Web.DE>
	<87fyo7j03q.fsf at magma.ca> <9cdba747602dd27e1dce99b54eedf30b at Web.DE>
	<87d5ja2xap.fsf at magma.ca>
	<0F58F99A-B6DD-4AE9-8F3C-FE79A62445C9 at Web.DE>
	<87hd8l7wri.fsf at magma.ca>
	<575A660C-5CA7-48D5-A351-09B239196727 at Web.DE>
	<878xtv8xx7.fsf at magma.ca>
NNTP-Posting-Host: lists.gnu.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: news.Stanford.EDU 1136524104 22134 199.232.76.165 (6 Jan 2006 05:08:24 GMT)
X-Complaints-To: news at news.stanford.edu
Cc: help-gnu-em... at gnu.org
To: Angelina Carlton <b... at magma.ca>
Envelope-to: help-gnu-em... at gnu.org
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com;
	h=received:to:cc:subject:references:from:in-reply-to:message-id:lines:user-agent:mime-version:content-type:date;
	b=NLIu9zXFegB+Lx2Lq44ugfTmz25fxiQ/374t2m1+Yhk1llOF/UFTTMNmpQ4LZUQHx8aHudppha19HMnJRmE2hHX/UYEisLYfLxxUrpO8sJMkfhrNRPAo4pa10kVCditxsef+u9UQoqhMl4CItjUdNwHaoOQXYjtuvXP7w8IhImw=
In-Reply-To: <878xtv8xx7.fsf at magma.ca>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4
X-BeenThere: help-gnu-em... at gnu.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
List-Unsubscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-requ... at gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/help-gnu-emacs>
List-Post: <mailto:help-gnu-em... at gnu.org>
List-Help: <mailto:help-gnu-emacs-requ... at gnu.org?subject=help>
List-Subscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-requ... at gnu.org?subject=subscribe>

<<<

>>> header, mail version

X-From-Line: nobrow... at gmail.com Fri Jan 06 00:08:17 2006
Return-path: <nobrow... at gmail.com>
Envelope-to: itz at unicorn
Delivery-date: Fri, 06 Jan 2006 00:08:17 -0500
Received: from itz by unicorn with local (Exim 4.60)
	(envelope-from <nobrow... at gmail.com>)
	id 1Eujpp-0001ND-FL; Fri, 06 Jan 2006 00:08:17 -0500
To: Angelina Carlton <b... at magma.ca>
Cc: help-gnu-emacs at gnu.org
Subject: Re: emacs-snapshot keybinding problem
References: <mailman.20812.1135883611.20277.help-gnu-emacs at gnu.org>
	<87zmmjyz2z.fsf-monnier+gnu.emacs.help at gnu.org>
	<8764p6u0mp.fsf at magma.ca> <89094436dbe19fc651e2bc3fd10bfcce at Web.DE>
	<87y822sagk.fsf at magma.ca> <3c110c9e9c722c8b8843bee0bea47a2f at Web.DE>
	<87hd8p5l5p.fsf at magma.ca> <9bc9d7eb4441de7f9ae098a8cf925706 at Web.DE>
	<87fyo7j03q.fsf at magma.ca> <9cdba747602dd27e1dce99b54eedf30b at Web.DE>
	<87d5ja2xap.fsf at magma.ca>	<0F58F99A-B6DD-4AE9-8F3C-FE79A62445C9 at Web.DE>
	<87hd8l7wri.fsf at magma.ca>	<575A660C-5CA7-48D5-A351-09B239196727 at Web.DE>
	<878xtv8xx7.fsf at magma.ca>
From: Ian Zimmerman <nobrow... at gmail.com>
Date: 06 Jan 2006 00:08:17 -0500
In-Reply-To: <878xtv8xx7.fsf at magma.ca>
X-Gnus-Mail-Source: directory:~/Mail/spool
Message-ID: <87hd8i9c5a.fsf at gmail.com>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Lines: 11
Xref: unicorn mail.emacs-help:3251


<<<

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