Hi Abhi -
by default when I hit the URL from a browser the request is a GET and also from SAP I understand the by default request is get , but the client is saying that he is not receiving any messages coz the URL should access there system as POST.
>>> I don't think this is correct. By default the main payload is posted using HTTP post.
http://help.sap.com/saphelp_nw73/helpdata/en/43/64dbb0af9f30b4e10000000a11466f/content.htm