Filtering .EXE files

Hi everybody,
        I'm new here (and my english is not good), but I gonna try to explain 
myself.
	Well, I have tried to filter the .EXE files in my sendmail 8.9.3 on linux 
RedHat 6.2, with the follow lines in procmailrc file:
:0 B
* .*filename=.*.exe
/home/lsepulve/exes/
:0 B
* .*filename=.*.EXE
/home/lsepulve/EXES/

	But the problem is that when the filename is like "execpcional.doc" or 
"EXECUTION.txt", the filter assume that is a .exe file, and then also 
filter the file, and these is not good!..
	Does somebody know how I have to compose the lines in procmailrc file for 
not filter  that kind of files?
        Thanks in advance and sorry for my english.

Luis

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