blocking mp3 files

[vinay poojary]

Dear Sir,
   
  i want to block mp3 files .
  I have added the same in the filename.rules.conf and the files are getting blocked but people started to rename the extension and sending it .Is there any way i could add the extension in the filetype.rules.conf file .
   
  Thks in advance 
   
   
  Regards,
  Vinay Poojary

 				
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