How Apple's Mail.app Junk Filter Works
fmorgan writes "O'Reilly has now posted the second part on an article about Mac OS X Mail.app spam filtering with more details on what this technology is (and isn't): 'Many myths have emerged about Mail's junk mail filter. No, it's not an extremely complex set of rules, no it doesn't look for keywords, and no, it doesn't use white magic ... Interestingly enough, the technology that underlies the Junk Mail filter began its life as an information retrieval system.'"
You can also tell Outlook not to check mail. That's pretty foolproof. Even better, move Outlook to a safe place, such as the trash bit. That's a pretty good way to avoid any offending code.