[Mailman-Users] Can't "close" a list

[Bernie Cosell]

Sorry to be posting another incredibly dumb question, but after my last 
go-round [wherein I learned that I had the RE just right but my #@#%$@#$% 
ISP runs spam assassing *after* mailman] I decided to try "closing" the 
list.  So I checked thet FAQs and the manuals and did what I thought 
should do the job.  In my otherwise empty 'sender filters' I changed:

Action to take for postings from non-members for which no explicit action 
is defined.

to "hold"

The membership list consists of a single address, and I sent a message to 
the list from a different address and I was very surprised that it just 
went through.  So I tried a more brute-force thing for my test: I changed

   List of non-member addresses whose postings will be automatically 
rejected.

to "^.*"

And it came right through:

From: "Bernie Cosell" <bpcosell at email.vccs.edu>
Organization: Fantasy Farm Fibers
To: testlist at cosell.net
Date: Mon, 06 Jul 2015 15:38:20 -0400

Is there something else I need to enable or set or something other than 
the settings on the "sender filters" page to get outsiders blocked?

THANKS!  /bernie\

-- 
Bernie Cosell                     Fantasy Farm Fibers
mailto:bernie at fantasyfarm.com     Pearisburg, VA
    -->  Too many people, too few sheep  <--