Keeping your safe and blocked lists current is a big help to the filter.
The Junk E-mail Filter maintains three lists that keep track of your safe and blocked senders and recipients. To tell the Junk E-mail Filter whether mail to or from a specific person should be let into your Inbox, just add that person to one or more of the lists.
Note The Junk E-mail Filter never checks the Bcc line.
Two of the lists are safe lists: the Safe Senders list, and the Safe Recipients list. If a message comes from anyone listed on the Safe Senders list, or is addressed to anyone on the Safe Recipients list, then that message is routed directly to your Inbox. This is true even if other characteristics of the message, such as questionable content, would normally cause the filter to identify it as junk.
The third list is the Blocked Senders List. Any message that comes from any sender appearing on this list is sent to the Junk E-mail folder.
Tip If you add a sender to your Blocked Senders List, but messages from that sender still arrive in your Inbox, make sure that the sender is not also listed on one or both of your safe lists. (If there's any disagreement between a safe list and the blocked list, the safe list always wins.)
Note that by default, messages from e-mail addresses in your Outlook Contacts folder are considered safe and allowed into your Inbox automatically. Similarly, if you work at a company that uses Exchange Server, you'll automatically receive all messages sent from within your organization.
There are also two other, more specialized lists, one used to block all messages that come from a specific country or region, and another to block all messages that appear in a specific alphabet or character set. You'll find a link to more information on the Quick Reference Card at the end of this course.