[Mailman-Users] Managing junk subscription requests?

[hk]

I'm getting ready to move a large (800+ member) unmoderated list that's 
existed on L-soft to a mailman list.
Never had to deal with "junk" subscriptions before with this list.
Any suggestions on how to not have to deal with them in Mailman?
Below is a message from this morning from another list I've managed....
-h


-------- Original Message --------
Subject: 13 xxxxx moderator request(s) waiting
Date: Sat, 06 Apr 2013 08:00:01 -0500
From: xxxxx-bounces at xxxx.org
To: xxxxx-owner at xxxx.org

The xxxxx at xxxx.org mailing list has 13 request(s) waiting for
your consideration at:

	http://xxxx.org/cgi-bin/mailman/admindb/xxxxx
	
Please attend to this at your earliest convenience.  This notice of
pending requests, if any, will be sent out daily.

Pending subscriptions:

     vznend at rvkmvs.com (zkcpikpv) Wed Apr  3 13:55:05 2013
     jmbzdp at mkpqwt.com (lyiawz) Wed Apr  3 16:00:36 2013
     eumwov at hxxyhq.com (hlgaqwmmlw) Wed Apr  3 23:13:08 2013
     qzlhzb at nbwhyi.com (zwgnbwmpte) Thu Apr  4 01:39:23 2013
     emhody at olqryu.com (ksgwimsimjt) Thu Apr  4 06:06:54 2013
     hxpqyw at gykoiw.com (esntidwcc) Thu Apr  4 07:38:42 2013
     xtrhgo at vuwigf.com (amooqp) Thu Apr  4 08:48:31 2013
     nlojeo at hswzqx.com (xwddyqyfvs) Thu Apr  4 10:32:42 2013
     kxvbsk at ymjbaf.com (dczzstty) Thu Apr  4 16:39:15 2013
     pfrazw at zdgdiz.com (uknobk) Thu Apr  4 17:15:55 2013
     gcnrsr at oszhmu.com (fotyvcmlyt) Thu Apr  4 22:38:54 2013
     slucxa at xhbqzn.com (fqxvsvyou) Thu Apr  4 23:33:19 2013