Hi Urstruly,
How to find the Port is valid or not ?
Go to the ABAP stack and execute de transaction sxmb_ifr, it redirects to the main page with the port necessary,
You can get a valid URL from the sender agreement or via Service registry (Check tihs blog Publish services from PI 7.1 to the Service Registry.)
http://xxxx.xxxx.com:50000/sap/xi/engine?type=entry
This URL should be used to call the ABAP Engine directly via http. You would need to activa the service:
But i think you have developed a sender SOAP scenario, isn it?
Regards.