[Exim] setup of smarthost to a different port

Hello

I am setting up a mailserver. What I want to have happen is have host A, send all its out going mail to host X. I want the mail sent to host X on port 7070, and not port 25.

Well I setup the smarthost correctly in Exim and then it sends the mail to the other host. But the thing is it sends it to port 25 on the other host. I am wondering how can i specify to tell Exim to send the outgoing mail to host X on port 7070 instead of port 25.

I tried reading the documentation and looking through the sample config files, but that didn't help me.

If anyone could please let me know how to do this I'd be very greatful.
Nikhil