Your Friend the Address Book (and his Friend, the Previous Recipients List)
It is important to give trusted senders a Get-Out-Of-Jail-Free card so that their messages don’t get accidentally marked as spam. When you create your own spam filters, add two additional criteria to the filter: Exclude messages from people in your Address Book, and exclude messages from senders on your Previous Recipients list. The Previous Recipients list can be accessed under the Window menu item and contains the addresses of everyone you’ve sent messages to. Among other things, it’s the list Mail reads when it offers to auto-fill e-mail addresses while you’re composing them. Because this list is so comprehensive, it probably contains addresses of all the people you trust but don’t necessarily have in your Address Book, making it an excellent catch-all whitelist. On the other hand, if you’ve ever sent messages to spammers asking to be removed from their lists, their addresses will be on here, too, in which case you’ll want to look over the Previous Recipients list and delete any unwanted entries.
Figure 7 Make sure to exclude trusted senders from your spam control filters.