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From: Borja Marcos <borjam@sarenet.es>
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To: James Godwin <james@organicwire.net>, <freebsd-isp@freebsd.org>
Date: Mon, 9 Jun 2003 11:12:32 +0200
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Subject: Re: Block exe files with Sendmail
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=09This regular expressions were suggested by Hobbit in a Postfix mail li=
st=20
last year. It rejects any executable file, regardless of its name,=20
extension, extension of the extension, MIME type, etc.

=09
=09/^TV[nopqr]....[AB]..A.A....*AAAA...*AAAA/
=09/^M35[GHIJK].`..`..*````/

=09Some people didn't like them, but I think this is a very effective way=
 of=20
dealing with viruses. These lists are applied always in some mail servers=
=20
I administer, and they have rejected every infected message they have=20
received.

=09Of course, you must tell your users not to send executables, a bad=20
practice.





=09Borja.