Blocking 7-Zip archives

[Peter Lemieux]

I added a rule to archives.filename.rules.conf to block 7-Zip archives, but 
it doesn't seem to work.  I used

deny	\.7z$	-	-

with tabs between each field.  When I send a message with a .7z attachment 
it sails on through.

This is CentOS release 6.8 (Final)
This is Perl version 5.010001 (5.10.1)
This is MailScanner version 4.85.2


Peter