Postfix Header and Body Checks

Hi,
I would like to block these extensions : .js, .exe, .bat, .com, .scr (any others ?)
I have added this :
/^Content-(Disposition|Type).*name\s*=\s*"?(.*\.(com|js|bat|exe|scr))(\?=)?"?\s*(;|$)/x

to the the mail content filter in:
Global filters
postfix header and body checks

however when I test it, only the .scr is returning that it has been blocked by postfix.

What am I doing wrong ?

Thanks,

Richard

 

try to add them as mime header checks also