AntiGen Email scanning software allowes file through filter....

[Larry Pingree <geekguy@urs2.net>]

An older version of AntiGen software package for exchange allows any file 
with the name of test.zip and test.exe to pass through the filter list 
even if you are filtering *.exe and *.zip. I believe that anything 
called "test.*" would be permitted through the filter.  I have not 
confirmed the versions yet. But thought this was interesting.