[Mailman-Users] Help: spam filtering and email bouncing

[Mark Sapiro]

Kinson Liu wrote:
>
>The product of my company uses mailman and we have been receiving spams 
>from time to time. The spams are not directly from spammers, but 
>mailman-bounces and other valid list with -bounces at the end of the 
>list name. We've been looking through bounce processing on the admin 
>part, but it doesn't seem to be the solution of this question since it 
>is only for disabling email accounts. Spam filter under privacy option 
>seems the right place, but the two textareas do not make too much sense 
>to me. Please help. One of the sample is pasted below.


I'm sorry. I do not understand what your problem is.


>*From:* mailman-bounces at lists.helixcommunity.org 
>[mailto:mailman-bounces at lists.helixcommunity.org] *On Behalf Of *dacey 
>aseria
>*Sent:* Monday, June 12, 2006 7:38 AM
>*To:* some-valid-email-list at helixcommunity.org
>*Subject:* I'm not a follower... I'm a leader with the same idea


This looks like a Microsoft Outlook rendering of a message from the
'mailman' list posted to the list by "dacey aseria". This is the way
Outlook would show a message with

From: dacey aseria <user at example.com>

and

Sender: mailman-bounces at lists.helixcommunity.org

This would be the Sender in a message from the
mailman at lists.helixcommunity.org list. See
<http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq02.003.htp>
for more info. The Sender is set to the list-bounces address to help
get actual bounces returned to the proper place.

Is dacey aseria a list member? It looks like someone has spammed your
list by spoofing the address of a list member. There is no good way to
deal with this in Mailman although Privacy option->Spam filters may
help. The real solution is to do spam filtering in the incoming MTA
before the mail ever gets to Mailman.

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