I go to join another server, and a message pops up, saying, "You are not white-listed on this server!" What does this mean?
It means you have to contact the server owners through a forum or some other way and they add you to a list that lets you on the server.
Basically like you know those big guys in front of clubs who say: You aren't on the list? Like that techincally.
You can't until they add you into the allowed player list. I agree with hylian. Naughty jtc. Trying to join another server