don't scan outgoing exim queue?

[David Bishop]

The setup: I have exim (3.36) and mailscanner 4.28 on debian/woody.  I have
the split config files, using init and seperate spools for incoming and
outgoing (exim conf and MailScanner conf available upon request).  Note that
exim_incoming is used for both people sending us mail, as well as all
outgoing mail that's sent from the client machines, so the incoming/outgoing
is kinda disengenous.

The problem:  I have users sending files like 03145.mip.doc (<-real example)
to other architects quite a bit.  Of course, the file extension hiding picks
up on that, and quarintines the outgoing message.  Now, we really *want* the
file extension hiding protection for *incoming* messages, but it's biting us
hard for outgoing.  Seeing as getting architects to change their ways is a
fruitless venture, how can I configure it so that mailscanner doesn't scan
outgoing messages, just incoming (maybe by seeing if the reciever is local or
not)?

D.A.Bishop