| | have the same issue
i run outlook 03 as client for my exchange 03. i have serious anti spam filters running on the server but some leaks thru or i'd be losing valid mail from too aggressive server filtering.
you're talking about the client side anti spam msft filtering. you'd have to either set outlook antispam to delete those mails (not me, since about 25% is valid email) or set up rules in outlook or one of the third party utils to move the alleged spam to a folder that's a real folder not selected for synching. my impression is the msft "spam folder" is not a true folder but another view of your inbox like "large email's" is