[TUHS] Excessive bouncing ... argh!

Tom Ivar Helbekkmo tih at hamartun.priv.no
Sun Sep 24 00:57:35 AEST 2017


Theodore Ts'o <tytso at mit.edu> writes:

> That way only people who are using mail systems with DMARC get their
> From field munged, instead of punishing everyone using the mailing
> list.

Why should anyone need to?  Of all the mailing lists I'm on, this one is
the only one that has this problem.  For instance, on the NetBSD mailing
lists, my email reaches other recipients "From:" my real email address,
and SPF, DKIM, and DMARC all check out clean.  Here are the headers from
a message I sent to a NetBSD list, as received by my own system (whereas
the message I sent to the TUHS list last night was refused by my MTA):

| Return-Path: <bounces-current-users-owner-tih=hamartun.priv.no at NetBSD.org>
| Received: from 127.0.0.1 (HELO barsoom.hamartun.priv.no) by
|  barsoom.hamartun.priv.no (Archiveopteryx 3.2.0) with lmtp id
|  1490255725-9579-11611/4/764 for tih at hamartun.priv.no; Thu, 23 Mar 2017
|  07:55:25 +0000
| Received: from mail.netbsd.org (mail.NetBSD.org [IPv6:2001:470:a085:999::25])
| 	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
| 	(No client certificate requested)
| 	by barsoom.hamartun.priv.no (Postfix) with ESMTPS id 3CA3B1C7147
| 	for <tih at hamartun.priv.no>; Thu, 23 Mar 2017 08:55:23 +0100 (CET)
| Authentication-Results: barsoom.hamartun.priv.no; dmarc=pass header.from=hamartun.priv.no
| Authentication-Results: barsoom.hamartun.priv.no; spf=pass smtp.mailfrom=bounces-current-users-owner-tih=hamartun.priv.no at NetBSD.org
| Authentication-Results: barsoom.hamartun.priv.no;
| 	dkim=pass (1024-bit key) header.d=hamartun.priv.no header.i=@hamartun.priv.no header.b=Kykpwg+N
| Received: by mail.netbsd.org (Postfix, from userid 605)
| 	id 91AF78559D; Thu, 23 Mar 2017 07:55:16 +0000 (UTC)
| Delivered-To: Current-Users at netbsd.org
| Received: from localhost (localhost [127.0.0.1])
| 	by mail.netbsd.org (Postfix) with ESMTP id 04AC385569
| 	for <Current-Users at netbsd.org>; Thu, 23 Mar 2017 07:55:15 +0000 (UTC)
| X-Virus-Scanned: amavisd-new at netbsd.org
| Authentication-Results: mail.netbsd.org (amavisd-new);
| 	dkim=pass (1024-bit key) header.d=hamartun.priv.no
| Received: from mail.netbsd.org ([127.0.0.1])
| 	by localhost (mail.netbsd.org [127.0.0.1]) (amavisd-new, port 10025)
| 	with ESMTP id 07zfmByWfGGy for <Current-Users at netbsd.org>;
| 	Thu, 23 Mar 2017 07:55:14 +0000 (UTC)
| Received: from barsoom.hamartun.priv.no (barsoom.hamartun.priv.no [193.71.27.8])
| 	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
| 	(No client certificate requested)
| 	by mail.netbsd.org (Postfix) with ESMTPS id C3DAC84CDD
| 	for <Current-Users at netbsd.org>; Thu, 23 Mar 2017 07:55:12 +0000 (UTC)
| Received: from thuvia.hamartun.priv.no (thuvia.hamartun.priv.no [193.71.27.7])
| 	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
| 	(No client certificate requested)
| 	by barsoom.hamartun.priv.no (Postfix) with ESMTPS id 88A601C7147;
| 	Thu, 23 Mar 2017 08:55:09 +0100 (CET)
| Dkim-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hamartun.priv.no;
| 	s=barsoom; t=1490255709;
| 	bh=CSM3cuXAMyJtu0wLEPB+K0BzqULiVelaGy5gTvWwfpU=;
| 	h=From:To:Cc:Subject:References:Date:In-Reply-To;
| 	b=Kykpwg+NK0kSkDYEkvrISX7fDtK9tYUogDcyAb0cSd1ogwCIYnAFSWKg3mnlJb+9g
| 	 urP7MuokAxM2gUJeVqGdosqAjncrfMQYt0ii8Ops3Awx9q/Dx3bmDyEz8jMUIQxWmw
| 	 oiCiL1ZkcjF/xGKvrV97jRW3BvVCzpRyZfO4ad1I=
| Received: by thuvia.hamartun.priv.no (Postfix, from userid 501)
| 	id 707E34DE48; Thu, 23 Mar 2017 08:55:09 +0100 (CET)
| From: Tom Ivar Helbekkmo <tih at hamartun.priv.no>
| To: Paul Goyette <paul at whooppee.com>
| Cc: Current-Users at netbsd.org
| Subject: Re: Error/warning message from rc.d/npf
| References: <Pine.NEB.4.64.1703231345500.401 at speedy.whooppee.com>
| Date: Thu, 23 Mar 2017 08:55:09 +0100
| In-Reply-To: <Pine.NEB.4.64.1703231345500.401 at speedy.whooppee.com> (Paul
| 	Goyette's message of "Thu, 23 Mar 2017 13:55:01 +0800")
| Message-Id: <m2wpbg1l7m.fsf at thuvia.hamartun.priv.no>
| User-Agent: Gnus/5.130012 (Ma Gnus v0.12) Emacs/24.5 (berkeley-unix)
| Mime-Version: 1.0
| Content-Type: text/plain
| Sender: current-users-owner at NetBSD.ORG
| List-Id: current-users.NetBSD.org
| Precedence: bulk
| Content-Transfer-Encoding: quoted-printable

-tih
-- 
Most people who graduate with CS degrees don't understand the significance
of Lisp.  Lisp is the most important idea in computer science.  --Alan Kay



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