Dear experts,
We are in process of testing a PI scenario.A server based in USA is trying to send us an AS2 message.Out of 4 attempts and some juggling with the firewall rules,we can see that one attempt of that ip is existing in firewall logs and firewall has passed same.Rest three didn't even reach the firewall. Now after firewall ,we expect this message to reach at SAP PO.There are no signs at component monitoring or message monitor.Customer is getting in return the error "Message has been rejected by EDI partner". But we cannot conclude where between firewall and PO server,the actual problem lies. My query is what are the specific logs where we would need to prob on these things. ?