[Exim] message_body_visible

Hi all

We use the attachment filtering script available on the exim.org site to
prevent unwanted attachments, but I've noticed that some of the attachments
are still getting through. This _seems_ to be those emails that have been
forwarded a number of times before they hit our mail server, thus making me
think (wrongly?) that the attachment is "buried" too deep for the script to
pick up.

I was wondering, if I add message_body_visible = 5000 (syntax?) whether that
would take care of it?

TIA
/wiZZ