I have a problem with double posting error messages which my list subscribers are receiving every time the post to the list. I have searched through the archives and found several references to this problem however I have not been able to identify which subscriber is mirroring messages back to my list since there is no identifiable domain in the email headers. I suspect that it is the IP address 80.253.119.74 which is the culprit and have traced this to ns2.softflare.net which is a company providing web hosting services however no subscribers on my list use this domain. Does anyone have any ideas on how I might resolve this problem? I have included the error message and headers below. Kind Regards Ingrid Walker Email: [log in to unmask] Your message is being returned to you unprocessed because it appears to have already been distributed to the PTNC list. That is, a message with identical text (but possibly with different mail headers) has been posted to the list recently, either by you or by someone else. If you have reason to resend this message to the list (for instance because you have been notified of a hardware failure with loss of data), please alter the text of the message in some way and resend it to the list. Note that altering the "Subject:" line or adding blank lines at the top or bottom of the message is not sufficient; you should instead add a sentence or two at the top explaining why you are resending the message, so that the other subscribers understand why they are getting two copies of the same message. Return-Path: <[log in to unmask]> Received: from 80.253.119.74 by GUAVA.EASE.LSOFT.COM (SMTPL release 1.0m) with TCP; Fri, 6 Jan 2006 09:10:05 -0500 Received: (qmail 30919 invoked by uid 501); 6 Jan 2006 14:10:04 -0000 Received: (qmail 30915 invoked by uid 501); 6 Jan 2006 14:10:04 -0000 Received: by simscan 1.1.0 ppid: 30907, pid: 30912, t: 0.0989s scanners: regex: 1.1.0 attach: 1.1.0 clamav: 0.87.1/m:34/d:1197 Received: from unknown (HELO gazelle.ease.lsoft.com) (209.119.0.5) by 0 with SMTP; 6 Jan 2006 14:10:04 -0000 Received: from guava (guava.ease.lsoft.com) by gazelle.ease.lsoft.com (LSMTP for Windows NT v1.1b) with SMTP id <[log in to unmask]>; Fri, 6 Jan 2006 9:09:54 -0500 Received: by NETWORKS.IOP.ORG (LISTSERV-TCP/IP release 14.4) with spool id 1223 for [log in to unmask]; Fri, 6 Jan 2006 09:09:54 -0500 Received: from 193.252.22.157 by GUAVA.EASE.LSOFT.COM (SMTPL release 1.0m) with TCP; Fri, 6 Jan 2006 08:59:30 -0500 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3112.me.freeserve.com (SMTP Server) with ESMTP id D03715800090 for <[log in to unmask]>; Fri, 6 Jan 2006 14:59:29 +0100 (CET) Received: from wwinf3102 (wwinf3102 [172.22.158.29]) by mwinf3112.me.freeserve.com (SMTP Server) with ESMTP id CBECA580008F for <[log in to unmask]>; Fri, 6 Jan 2006 14:59:29 +0100 (CET) Date: 6 Jan 2006 14:59:29 +0100 Message-ID: <19243782.1136555969818.JavaMail.www@wwinf3102> From: "I Ebeyer" <[log in to unmask]> Sender: "Physics Teaching News and Comments" <[log in to unmask]> Reply-To: "Physics Teaching News and Comments" <[log in to unmask]> To: [log in to unmask] X-ME-UUID: [log in to unmask] Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [82.44.93.217] X-Wum-Nature: EMAIL-NATURE X-WUM-FROM: |~| X-WUM-TO: |~| X-WUM-REPLYTO: |~| Subject: [PTNC] Test message 06/01 (2) - Please ignore Precedence: list List-Help: <http://networks.iop.org/scripts/wa-IOP.exe?LIST=PTNC>, <mailto:[log in to unmask]> List-Unsubscribe: <mailto:[log in to unmask]> List-Subscribe: <mailto:[log in to unmask]> List-Owner: <mailto:[log in to unmask]> List-Archive: <http://networks.iop.org/scripts/wa-IOP.exe?LIST=PTNC>