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You probably want to look at something like fetchmail and/or procmail to divert your mail to your machine. That or you should setup your mail client to grab the mail from your email server, assuming your email server has pop or imap setup on it.
Fetchmail and/or procmail are probably already on system (you didn't say which distro though...) so you won't need to grab them, just configure them. If you don't have em, head over to:
And search for their homepages, where you will also find documentation on setting them up.