Block exe files with Sendmail

[Borja Marcos]

	This regular expressions were suggested by Hobbit in a Postfix mail list 
last year. It rejects any executable file, regardless of its name, 
extension, extension of the extension, MIME type, etc.

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

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

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





	Borja.