Are you losing too much 'good' e-mail because it's lost in the spam in your inbox? Create a filter moving all e-mail NOT from people in your address book to a different folder.
Outlook 2002 and up have rules conditions for "sender is in specified address book". Create a rule using this condition to move messages to a new folder or use it as an exception to a rule which moves all other mail to another folder.
Published August 25, 2003. Last updated on September 6, 2013.