[Mailman-Users] mail keeps looping back to list due to filter rule

[Matthew Clarkson]

My mailing lists have been running fine on our mailman 2.1.7 server  
for the last year, however, I just implemented a filter for spam on  
one of our public lists to catch anything that spamassassin marks  
with a ***SPAM*** subject.  The filter rule I imposed on this list is

subject: .*SPAM.*

however, now it loops mail back to the list that match this filter  
rule, locking the list up (I get stale locks in the locks/  
directory).  The only way to recover from the endless loops is by  
removing the stale locks and then discarding all .pck's to the list  
with the discard command (otherwise, the web interface gets locked up  
due to too many messages).

Here is the first bit of the moderator request email I get notifying  
me of pending requests to be dealt with (list name replaced by mylist).

------------------------------------------------

Pending posts:
From: theoeustacia at enterfree.it on Fri Oct 20 22:54:04 2006
Subject: ***SPAM*** Sweet
Cause: The message headers matched a filter rule

From: mylist-owner at mailman.netera.ca on Fri Oct 20 22:54:08 2006
Subject: mylist post from theoeustacia at enterfree.it requires approval
Cause: The message headers matched a filter rule

From: mylist-owner at mailman.netera.ca on Fri Oct 20 22:54:16 2006
Subject: mylist post from mylist-owner at mailman.netera.ca requires  
approval
Cause: The message headers matched a filter rule

From: mylist-owner at mailman.netera.ca on Fri Oct 20 22:54:20 2006
Subject: mylist post from mylist-owner at mailman.netera.ca requires  
approval
Cause: The message headers matched a filter rule

...
...
...

------------------------------------------------

Does anyone know what my be causing this, or where I can fix this?   
it seems as though the mylist-owner at ... address is looping it right  
back to the original address, of which it gives "Cause: The message  
headers matched a filter rule", is there an easy way around this?   
since I know this must be common practice to filter via spam headers.

Thanks for any help.

--
Matthew Clarkson
Netera Alliance