Hi there Surfer
After following your setup again I was able to replicate the issue BUT only with the Puresight plugin enabled on the 2nd WWW proxy service that I was using (using HTTP 1.1 set in Reget).
This is to be expected since as Pascal mentioned earlier:
That was the only tag I could discover in the HTTP 1.1 RFC that would allow resuming of a download and that is disabled if there are any enabled Plugins for that service.
This is done as a safeguard top prevent any viruses etc coming through the service(via retries) which is why you get the message in Reget that the server doesn't support retries.
So as a workaround you could create a second WWW service in WinGate purely for Reget clients to connect to. Disable the plugin for this particular service and have your clients set there Reget program to use this for downloading via HTTP. Obviously there will be no protection from plugins for the Reget users.
Also I noticed that you configured your WWW service for port 8010 which is the default port for the Logfile Service in WinGate, I presume that you have deleted/dont require the Logfile service for this to work that way.
Regards
Erwin