When you say "If the server responds with hostname not found", what are you talking about? Exactly which protocol are you refering to when you say "hostname not found" ?
Most web servers will just fall back to the default virtual hosts SSL certificate if no SNI header is present in the clients request... They don't reply "hostname not found", or "nope, no such host", or anything similar...
Most web servers will just fall back to the default virtual hosts SSL certificate if no SNI header is present in the clients request... They don't reply "hostname not found", or "nope, no such host", or anything similar...