File attachment issue

[Pete]

Hi, i have never actually changed any of the settings regarding file
types, the only change i have made recently was to add bigevil and turn
off bayes.

Now .doc files are stored and the inline warning to sent to my users.

How do i specifically allow doc file through to any of my users - we
have plenty (4 layers) of  AV and our firewall blocks by type, so i
really want MS to leave the file attachments alone, unless its a virus
or something nasty DEFINITELY, not just the wrong file type.

How can i urgently rectify this ?

Thanks
Pete