[LIG] Blocking SPAM using Mailman

Hello
Does anyone have success blocking SPAM sent to members only mailing lists that
use mailman (version 2.1.6)?  The lists themselves aren't getting SPAM because
it's a members only list, however, the admin/moderator is getting lots of SPAM
in the moderation queue.

I've seen the ban from (subscribing to) list options and add to discard list,
however, the emails are randomized and I'm not sure if blacklisting dynamic IP
addresses is a good solution either.  I've even tried using some of the regular
expression legacy SPAM options based on subjects, with some success.

I've read through some of the mailman documentation, but couldn't find much
usefulness regarding SPAM filters.  Any suggestions that are known to work are
welcome.

Thanks,

Regards,

Komal

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