If you’re using Outlook 2003, Microsoft released updated junk mail definitions a couple of days ago. Visit Microsoft Office Update to install the update. (If you haven’t gone to Office Update for a while, you should also install service packs or anything else it offers, but keep in mind that you will probably be asked for the installation CD if you have any programs installed from Office XP or Office 2000. You won’t need the CD to update Office 2003.)