thank you very much for your effort to help me. This very old version of Indy server is embeded in unmaintaned larger SW, which is still buy by very bad company TRITONDIGITAL.com, which facticaly refuse any support for this SW. They bought SW in time when it was number one and did not maintain it. You can have notice that I am strange that I bought this SW 3 years ago. I had no information that they bought unmaintained SW in this time, because this SW looked like maintained with actual update dated on user interface. But it was unfortunately only their masquerade and it was lie from this bad company. But this SW is exelent and still almost fully functional. I have problem now that this terrible TRITONDIGITAL.com also killed server Audiorealm.com without any notice to clients and some functionality stopped working. I am trying to resolve this lost functionality where it needs send HTTP/text string to IP and port of Indy V.8 server. I suppose that the string could look like this:

POST /request=11139, hostIP=37.188.184.127 HTTP/1.1
Post: 213.220.250.193

I would like to find the simply way if it is syntax correct and how to test it by the most easiest way. I do not know how to activate ECHO in Telnet, because when I connect to Indy server, there is only blinked cursor in left upper corner and typed characters are invisible.

I was not fully sucessful to find documentation for Indy server, which is clear for me. Thank you for your understanding and thank you for any help and ideas how to do it easy.