One of the most handy features within Entourage 2004 is the ability to check your company's e-mail from home, on your Mac, and without ever firing up a VPN connection to your office. To configure Entourage to check e-mail from home, just do the following:
Once configured, you should now be able to read your mail from home without needing to VPN into your corporate network. I do this all the time on my PowerBook and don't ever bother to change the setting while in my office. Anywhere there's a wifi connection, I've got e-mail.
Geeky detail: Entourage relies on UDP notifications from the Exchange server to determine when new e-mail is available. Typically, when connected through the above method, the UDP notifications are blocked from ever arriving. To compensate, Entourage will ask the Exchange server once a minute for any new items within an Exchange mailbox.