[Mailman-Users] spam prevention

[Malthe Borch]

hello ng.

I'm getting tired of getting these messages (as admin) on my members-only list:

    From:    security at microsoft.com
    Subject: Use this patch immediately !
    Reason:  Post by non-member to a members-only list

How can I tell mailman to just automatically discard such posts. Or can I set a
time-out (i.e. 3 days), and if I take no action, they're deleted.

Thanks in advance.

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mail: mborch at audite.co.uk imm:m00mbt at math.ku.dk] pgp:
www.audite.co.uk/keys/mborch.asc
icq:  6980422