Here is a great reason to turn off the HTML settings in Outlook express.
Useing thunderbird will help this also, just never unmark mail as Junk, and you will only view ASCII Text.
http://www.internetweek.com/allStories/showArticle.jhtml?articleID=47902912
you can download a patch from Micro$oft here:
http://www.microsoft.com/security/bulletins/200409_jpeg.mspx