Or, even easier, don't use Outlook or its bastard spawn, Outlook Express. I've had one copy of bugbear sent to me, and have had to spend more time trying to explain the jbdgmgr hoax to someone who got sucked in like W'ON did. A virus encyclopedia site (my favourite is symantec's) should be on every one's bookmarks/favourites - and I do mean everyone's, since there are well over 400 documented viruses aimed at the Mac OSes.