i like to be able to send emails from my computer directly, i used to do this in windows using "free smtp" program, but i don't know how to do it in linux
FC4 installs "sendmail" by default, in a configuration that will work for you. All you have to do is configure your email client to use "localhost" as the email server.
However, I don't recommend that you do that. More and more sites are blocking email from "dial-up" lines (including DSL and cable connected hosts) as nearly all of the mail that comes directly from them is spam sent out by hacked Windows machines. You're better off using your ISP's email server.