MSN Explorer: Set the junk e-mail filter level
To set the level of filtering that you want the junk e-mail filter to use when your e-mail is delivered:
Click the Help & Settings menu, and then click Settings.
In the left pane, click E-mail.
Click Junk E-Mail Guard.
Click Junk e-mail filter.
Select the junk e-mail filter level that you want to use.
Click Save Changes.
Messages more than seven days old are automatically deleted from the Junk E-Mail folder.
If you access your MSN Mail through Windows Live Hotmail, you can delete junk e-mail immediately, rather than after seven days. When you use this feature in Windows Live Hotmail, junk e-mail is also automatically deleted in MSN Mail. To change this setting, sign in to the Windows Live Hotmail website, and open the Options page.