Please note that while editing your .forward file is the simplest way to forward your email, we strongly recommend filtering out spam with procmail first... see the procmail section below.
If you want to forward all of your CS email to another email address or to a specific CS machine, you can simply enter that address in a .forward file in your home directory:
% cd % cat > .forward myemail@gmail.com <Ctrl-D> %
...or you can simply edit your .forward file with any text editor, such as emacs, vi, or pico.
See also the man page, via man forward.