well, i guess this is on topic: a mail firewall.
i've been using and deploying a sendmail screen using procmail as a
filtering agent with great success. basically some mods to this:
http://www.impsec.org/email-tools/procmail-security.html
works like a champ. stops these situations dead in their tracks.
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jose nazario [EMAIL PROTECTED]
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PGP key ID 0xFD37F4E5 (pgp.mit.edu)
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