Blocking Spam in qmail?

[Bill Parker]

Hello All,

        I have the following addresses which generate some periodic
spam to my system:

        [EMAIL PROTECTED]
        [EMAIL PROTECTED]
        [EMAIL PROTECTED]

How does one go about dealing with this mess, as much as I would love
to block the aol.com domain 8^), I can't do it cause we have customers
who use AOL to get to our website..:(

Any ideas?

-Bill

p.s. - Where is the qmail book? (hint, hint)