[Mailman-Users] Question regarding SPAM

[Futchko, Rose]

Hi, I have a question about SPAM being sent via Mailman. 

1. Even though the message is marked as SPAM it is still sent to the
list
2. The sender is not a member of the moderated list
3. Spam filters at the other members site are catching the Spam and
returning the not delivered message (example below)
4. Have I mis-configured something in the Mailman to allow this to
happen (It happens often)

Thank you,
Rose

Example Message:


This is the mail delivery agent at messagelabs.com.
I was not able to deliver your message to the following addresses.

Remote host said: 554 5.7.9 Message not accepted for policy reasons.  

--- Below this line is a copy of the message.

Return-Path: <mailman-bounces at list.informs.org>
X-Env-Sender: mailman-bounces at list.informs.org
X-Msg-Ref: server-8.tower-85.messagelabs.com!1348767090!55220986!1
X-Originating-IP: [216.230.111.83]
X-StarScan-Received:
X-StarScan-Version: 6.6.1.3; banners=-,-,-
X-VirusChecked: Checked
Received: (qmail 16887 invoked from network); 27 Sep 2012 17:31:30 -0000
Received: from mail.informs.com (HELO mail.informs.org) (216.230.111.83)
  by server-8.tower-85.messagelabs.com with SMTP; 27 Sep 2012 17:31:30
-0000
Received: by mail.informs.org (Postfix, from userid 506)
	id 7354A20798; Thu, 27 Sep 2012 13:31:30 -0400 (EDT)
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
	informs-app02-listserv.custcbb.local
X-Spam-Flag: YES
X-Spam-Level: *******************
X-Spam-Status: Yes, score=19.2 required=5.0
tests=BAYES_99,DATE_IN_PAST_03_06,
	
Received: from informs-app02-listserv.custcbb.local (localhost
[127.0.0.1])
	by mail.informs.org (Postfix) with ESMTP id DE0E42086E;
	Thu, 27 Sep 2012 13:31:29 -0400 (EDT)

Date: Thu, 27 Sep 2012 06:31:17 -0600
From: Cierra Orozco via LinkedIn <member at linkedin.com>
Reply-To: Cierra Orozco <JacksonYore at mnp.ca>
To: southeastern-michigan-chapter-owner
	<southeastern-michigan-chapter-owner at list.informs.org>
Message-ID:
<126881171.1872436.8821718263356.JavaMail.app at ela0-app0430.prod>
Subject: [SPAM] United Postal Service Tracking Number H8260315491
MIME-Version: 1.0
Content-Type: multipart/alternative; 
	boundary="----=_Part_2502201_6486519708.0424312323509"