[exim] testing routing and -bh

I have some routing rules that depend on the IP of the sending host
and the contents of the mail body.

I tried using -bh to test these, but I didn't see any router output.
Is -bh intended only for testing ACL's, or am I missing something (I
invoked exim with -d+route -bh)?

Is there any good way to test this setup? I can suppress delivery
with -N, but it doesn't look as if I can fake the IP address at the
same time.

I'm trying to stay in testing mode since my first crack at the router
produced a mail loop.

Ross Boylan