[Exim] Attachment Filtering

Hi All,

I'm needing a little help. I'm wanting to filter out on one of the machines I administer all attachments with a .exe .com .bat .vba etc, basically anything that'll execute on a Windows machine. I've found the system_filter.exim but the installation instructions arent very well explained I feel.

The systems is a Debian 2.2 machine with exim 3.12-10.2.

Any help in trying to enable this attachment filter or another filter of some description would be greatly appreciated.

Adrian