The one thing that's sure: it's not Outlook Express doing it. Either you installed your own anti-spam program (as part of some Internet security suite or so) or it's the spam filter with your mail provider.
The first one might be easy to solve by changing the rules for that program. The second is something you can't do anything about.
I have recently begun corresponding with a business associate and all of her emails come through with "Spam" in the title. Is there a way I can stop this? I don't see anywhere to instruct Outlook to accept this a good email, even though this person is in my address book.
I am using OE on MS-XP.