how does the office 2003 junk filter work

how does the office 2003 junk filter learn how to get rid of junk
mail? i have run office 2003 for ages now and it still lets loads of
junk mail through. does it learn simply when you make a mail part of
the junk sender lists or is it cleverer than that. i have my junk
filter set to high.

secondly how do i add more than one mail to the junk senders list at a
time. if i have 2000 spam mails that i want to add to my spam list ,
adding them indiviually is really time consuming..

Glenn M,
Here is an overview:
http://office.microsoft.com/training...2cRC%2cFX%2cXT
About the junk email filter in Outlook 2003:
http://office.microsoft.com/assistan... P010423191033