[exim] Router testing with "source port"

Hi list!

I have in my exim configuration many routers depending from the port
used to send the E-Mail.
Now I need to test them and I really don't know how... :(

To test a router I usually use exim -bt blah@???, but so exim use
ignore the source port.
Is there any option for "exim -bt" to specify the source port of the E-Mail?
Otherwise I really don't know how to test the routers...

Thanks a lot for your help!
Luca Bertoncello
(lucabert@???)