Enable this option so that spam messages with your own return address are not marked as good. (Spammers sometimes forge the return address to be your own, in an attempt to get through spam filters.) Disable this option if you send yourself messages and want to make sure that they are never marked as spam. SpamSieve looks on the “Me” card in Apple’s Address Book to determine which addresses are yours. The easiest way to add your addresses to the “Me” card is to open your mail program and then use SpamSieve’s Update Address Book “Me” Card command.
You can also use this feature to catch spam messages sent from certain addresses in your address book. Normally, if you have Use Mac OS X Address Book checked, messages from addresses in your address book will never be classified as spam. This is generally what you want, but there may be one or two particular addresses that spammers keep forging. By using Exclude my addresses and adding those addresses to the “Me” card in Address Book, you can get SpamSieve to analyze the full contents of those messages to determine whether they are spam. SpamSieve will continue to use the other addresses in the address book as before, always classifying messages from them as good.