(This is partially to push this thread back up to the top - BA didn't read before he posted!)
There are known weaknesses in MS Outlook & Express which allow viruses to propagate themselves to everyone in the address books. Use of Eudora (or Netscape Communicator?) prevents this happening, but it does not insulate you from the effects of the virus on your own system (I know, I use Eudora but the LoveBug still clobbered me but GOOD!)
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Feline
(I Sit, I Watch, I Smile)