[Mailman-Users] duplicates

Wed Oct 21 17:45:06 EDT 2015

On 10/21/2015 02:14 PM, Marco Stoecker wrote:
> 
> How do I identify whether the message comes from mailman or list1 or list2?
> Sorry for the questions, I'm not that experienced so far.

Here are some of the headers of your message as I received it from the
mailman-users list with my comments interspersed. How you actually see
these headers depends on your mail client. It may be something like
"show original" or "view source" or something else depending on the
client. I have removed some headers which aren't relevant to this
discussion.

> Return-Path: <mailman-users-bounces+mark=msapiro.net at python.org>

Above shows the envelope sender of the message which is the VERPed
mailman-users-bounces address.

> X-Original-To: mark at msapiro.net
> Delivered-To: msapiro_mark at sbh16.songbird.com

Above are from my Postfix.

> Received: from mail.python.org (mail.python.org [82.94.164.166])
> 	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
> 	(No client certificate requested)
> 	by sbh16.songbird.com (Postfix) with ESMTPS id 4CDC511E0176
> 	for <mark at msapiro.net>; Wed, 21 Oct 2015 14:14:41 -0700 (PDT)

>From my Postfix showing receipt from mail.python.org and id 4CDC511E0176
which I can find in my Postfix logs.

> Received: from albatross.python.org (localhost [127.0.0.1])
> 	by mail.python.org (Postfix) with ESMTP id 3nh4Mg1yt4zR5g
> 	for <mark at msapiro.net>; Wed, 21 Oct 2015 23:14:39 +0200 (CEST)

Postfix on albatross.python.org (another name for mail.python.org)
received the message from Mailman on mail.python.org.

> X-Original-To: mailman-users at python.org
> Delivered-To: mailman-users at mail.python.org
> Received: from albatross.python.org (localhost [127.0.0.1])
>  by mail.python.org (Postfix) with ESMTP id 3nh4M35Td4zQHp
>  for <mailman-users at python.org>; Wed, 21 Oct 2015 23:14:07 +0200 (CEST)

mail.python.org receiving and delivering the message to Mailman

(spam_bayes related headers removed)
> Received: from localhost (HELO mail.python.org) (127.0.0.1)
>  by albatross.python.org with SMTP; 21 Oct 2015 23:14:07 +0200

Message passing to spam_bayes processing on albatross.python.org.

> Received: from metaxa.loswebos.de (metaxa.loswebos.de [213.187.93.206])
>  (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
>  (No client certificate requested)
>  by mail.python.org (Postfix) with ESMTPS
>  for <mailman-users at python.org>; Wed, 21 Oct 2015 23:14:06 +0200 (CEST)

Message received from your relay metaxa.loswebos.de by mail.python.org.

> Received: from [192.168.178.20] (ipbcc26d30.dynamic.kabel-deutschland.de
>  [188.194.109.48])
>  by metaxa.loswebos.de (Postfix) with ESMTPSA id D09F03A8C012
>  for <mailman-users at python.org>; Wed, 21 Oct 2015 23:14:04 +0200 (CEST)

Message received from you by your relay.

Note that all the above headers are added by MTAs to the beginning of
the message so the "higher up" they are, the more recent they are.

> Message-ID: <5628001C.6020400 at stoecker-family.de>
> Date: Wed, 21 Oct 2015 23:14:04 +0200
> From: Marco Stoecker <marco at stoecker-family.de>
> User-Agent: Mozilla/5.0 (X11; Linux x86_64;
>  rv:31.0) Gecko/20100101 Icedove/31.8.0
> MIME-Version: 1.0
> To: mailman-users at python.org
> References: <5509F231.4010102 at stoecker-family.de>
>  <550AF7BE.4010208 at msapiro.net> <550B15EC.20603 at stoecker-family.de>
>  <550B2460.8020100 at msapiro.net> <550B4C0D.2000302 at stoecker-family.de>
>  <550B53E6.5020209 at msapiro.net> <550C2F73.7050800 at stoecker-family.de>
>  <550C34ED.2070207 at msapiro.net> <550C3FF6.6010306 at stoecker-family.de>
>  <550C46EC.6020900 at msapiro.net> <550C4ADC.9050303 at stoecker-family.de>
>  <5626D222.9070103 at stoecker-family.de> <5626DEF9.3090400 at msapiro.net>
>  <56272D7A.20603 at stoecker-family.de> <5627B5BA.2000702 at msapiro.net>
> In-Reply-To: <5627B5BA.2000702 at msapiro.net>

The group above are all in your original message as sent.

> Subject: Re: [Mailman-Users] duplicates

This may have been modified by Mailman's subject prefixing.

> X-BeenThere: mailman-users at python.org

This was added by mailman to say the message has been processed by the
mailman-users at python.org list.

> X-Mailman-Version: 2.1.20+
> Precedence: list
> List-Id: Mailman mailing list management users <mailman-users.python.org>
> List-Unsubscribe: <https://mail.python.org/mailman/options/mailman-users>,
>  <mailto:mailman-users-request at python.org?subject=unsubscribe>
> List-Archive: <http://mail.python.org/pipermail/mailman-users/>
> List-Post: <mailto:mailman-users at python.org>
> List-Help: <mailto:mailman-users-request at python.org?subject=help>
> List-Subscribe: <https://mail.python.org/mailman/listinfo/mailman-users>,
>  <mailto:mailman-users-request at python.org?subject=subscribe>

Added by Mailman.

> Content-Type: text/plain; charset="us-ascii"
> Content-Transfer-Encoding: 7bit

Possibly modified by Mailman's content filtering but not in this case
since there is no X-Content-Filtered-By: header.

> Errors-To: mailman-users-bounces+mark=msapiro.net at python.org
> Sender: "Mailman-Users" <mailman-users-bounces+mark=msapiro.net at python.org>

Added by Mailman.

If you just get the complete headers from all the duplicates of one
message received by one user and post those, I can help interpret them.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan