I still get this response
[@VAS-SRV1 ~]$ wget --post-data="SendEmail?serverName=serverA&msgBody=werty" http://10.1.21.236:8585/pns.asmx
Connecting to 10.1.21.236:8585... connected.
HTTP request sent, awaiting response... 500 Internal Server Error
08:57:59 ERROR 500: Internal Server Error.
P.S The only difference between your given resolution and the previous one I tried is that at yours "awating response" process has a delay of 5 seconds and then gives the error.