IDHTTP.Get - "Socket Error #11001. Host not found""

[kudzu]

Host not found means that the server isnt available or reachable from that client location. If they are using a proxy, then it might be blocking that due to firewall policy, or that a proxy is required and you are not using the proxy. For HTTP most proxies are transparent, but some places still use the very old SOCKS or HTTP proxy in which you have to tell Indy to use them and need the proxy info from the user.