Entourage Won't Send


Entourage will receive messages fine, but when i go to send them it says that there is an error "An operation on the server timed out. The server may be down, overloaded or there may be too much net traffic." I have received this error over and over again, even when i go to different places and try to see if it works. I'm not very good with computers, so I really need some help!!
Who is your ISP, or web host? Some ISPs block outgoing email unless it is sent through their mail server.