From owner-freebsd-questions@FreeBSD.ORG Tue Sep 11 10:17:34 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0ECA016A41B for ; Tue, 11 Sep 2007 10:17:34 +0000 (UTC) (envelope-from jonathan+freebsd-questions@hst.org.za) Received: from hermes.hst.org.za (onix.hst.org.za [209.203.2.133]) by mx1.freebsd.org (Postfix) with ESMTP id 5A1AD13C48E for ; Tue, 11 Sep 2007 10:17:32 +0000 (UTC) (envelope-from jonathan+freebsd-questions@hst.org.za) Received: from sysadmin.hst.org.za (sysadmin.int.dbn.hst.org.za [10.1.1.20]) (authenticated bits=0) by hermes.hst.org.za (8.13.8/8.13.8) with ESMTP id l8BADGkD037905 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO) for ; Tue, 11 Sep 2007 12:13:17 +0200 (SAST) (envelope-from jonathan+freebsd-questions@hst.org.za) From: Jonathan McKeown Organization: Health Systems Trust To: freebsd-questions@freebsd.org Date: Tue, 11 Sep 2007 12:20:09 +0200 User-Agent: KMail/1.7.2 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200709111220.09785.jonathan+freebsd-questions@hst.org.za> X-Spam-Score: -3.977 () ALL_TRUSTED,BAYES_00 X-Scanned-By: MIMEDefang 2.61 on 209.203.2.133 Subject: (off-topic) Outlook 2003 msgids causing odd email problems X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Sep 2007 10:17:34 -0000 I'm raising this here in case anyone else has either seen this problem and has any thoughts, or alternatively has experienced the fallout and is wondering why. Over the last few weeks I've had complaints that email messages are going astray. This has happened in Cyrus imapd on delivery, and in Mailman, where archiving of posts is sometimes broken. After much scratching of head and tearing of hair, I have finally found two provable instances - one in Cyrus and one in Mailman - of replies to messages being sent using Microsoft Outlook Service Pack 2, where Outlook has given the reply the same message-id as the message it is replying to - in flat violation of RFC{2}822. (In one case the original message, the read-receipt automatically generated by Outlook, the reply, and the forward of the reply sent when the reply didn't arrive, all had the same msg-id). As far as I can tell this behaviour was introduced by SP2; the Web says Outlook 2003 before that didn't add message-ids at all. I've now set duplicatesuppression no in imapd.conf which seems to be addressing the problem of lmtpd discarding the ``duplicate'' messages. Mailman is another issue. I haven't seen any discussion of this problem on the Web: has anyone else encountered it? Better yet, does anyone have a fix (on the Microsoft side)? Jonathan