Instructions (for Outlook 2003 - Outlook XP configuration is similar, but locations may be different):
Start by going to the Tools menu,
Select Rules and Alerts (if this does not appear in the Tools menu, expand the menu by clicking on the down arrow at the bottom of the menu)

Microsoft Outlook 2003 Rules and Alerts Window
 


1. In the Rules and Alerts window, click New Rule 
2. In the  Rules Wizard window, select Start from a blank rule and click OK. 
3. Under Step 1: Select Conditions, check with specific words in the message header
4. Under Step 2: Edit the rule description, click on specific words (underlined in blue)
5. In the Search Text window, enter X-Spam-Flag: YES (double-check for accuracy and capital letters)
6. Back in the Rules Wizard window, click Next >
7. Under Step 1: Select Actions, check move it to the specified folder and stop processing more rules
8. Under Step 2: Edit the rule description, click on specified folder (underlined in blue)
9. Back in the Rules Wizard window under Rule Description, click on specified folder
10. Choose a folder where you want spam e-mail to be filtered.  If necessary, click New and create a Junk E-mail folder as a subfolder in your Inbox folder.  This will allow you to review all of your spam messages before deleting them.  Click OK once finished.
11. Click Finish to close the Rules Wizard, and then OK to close the Rules and Alerts window

If Outlook is configured properly, all e-mails designated as spam by the eMail2Pop Spam Filter will automatically be separated from non-spam e-mail and moved into a designated Junk E-mail folder.  You can then review the flagged e-mails and delete them at any time.