Outlook's junk mail filter has no training component other than the
white and black lists.
It would seem to be fairly useless, then. Especially since the spammers
could reverse-engineer how it works, and guarantee their spams will get
into every Outlook 2003 inbox on the planet!
The ability to "train" an email filter seems to be a critical element in
whether or not it's effective. I switched to Outlook 2003, myself, based
on the promise of better spam filtering ... but have found it to be a
waste of time and money.
If I may ask ... how is Outlook 2003's spam filtering any better than
past spam filters, if it cannot be trained?