[Exim] Delivery to relay host

Hi,

I need to setup Exim 3.36 on machine A to send all mail to machine B
- also Exim 3.36 - for delivery to the final destination. (It is a relay
setup)

This is due to Firewall policies allowing only 1 machine to initiate
outgoing SMTP. Machine A generates quite a bit of mail via scripts.

Where do I start in the manual? I can only find how to control relay,
but not how to force it :-))

Regards

Nico