Outlook 2010

  1. Go to File and, on the Info tab,  scroll down to Manage Rules and Alerts.
  2. At the top where you see an option for Apply changes to this folder make sure to choose the folder that represents your Inbox.
  3. Click on New Rule.
  4. Go to Start from a Blank Rule.
  5. Choose Apply rule on messages I receive
  6. Click Next
  7. Check With specific words in the message header.
  8. Click on the link for specific words in the rule description area in the box below.
  9. Type in: X-Score-High: YES.
  10. Click Add.
  11. Click OK.
  12. Click Next.
  13. Select Move it to the specified folder.
  14. Click on the link for specified in the Rule description area below.
  15. Select Junk Email (or other, if you prefer) as the destination folder for suspected spam.
  16. Click OK.
  17. Click Next.
  18. Click Next (unless you need to add exceptions).
  19. Check Turn on this rule.
  20. Click Finish, Apply, and OK.

IMAP users should note that messages marked for deletion, or those that are moved to another folder (as in the case of these spam-filtering rules) will not be purged automatically from the Inbox of your IMAP account. This will make it appear as if the filter you just set up is not completing the task of deleting mail from your Inbox, but Outlook is performing as designed.

Outlook 2003 & 2007

Before starting, make sure that you have a folder that will serve as the destination for suspected spam. Create a new one if necessary.
  1. Open the Tools menu and select Rules and Alerts.
  2. At the top where you see an option for Apply changes to this folder make sure to choose the folder that represents your Inbox.
  3. Click on New Rule.
  4. Select Start from a Blank Rule.
  5. Choose Check messages when they arrive
  6. Click Next
  7. Check With specific words in the message header (you may need to scroll to see it).
  8. Click on the link for specific words in the Rule description area.
  9. Type in: X-Score-High: YES.
  10. Click Add.
  11. Click OK.
  12. Click Next.
  13. Select Move it to the specified folder.
  14. Click on the link for specified in the Rule description area below.
  15. Specify the destination folder for suspected spam.
  16. Click OK.
  17. Click Next.
  18. Click Next (unless you need to add exceptions).
  19. Check Turn on this rule.
  20. Click Finish, Apply, and OK.

IMAP users should note that messages marked for deletion, or those that are moved to another folder (as in the case of these spam-filtering rules) will not be purged automatically from the Inbox of your IMAP account. This will make it appear as if the filter you just set up is not completing the task of deleting mail from your Inbox, but Outlook is performing as designed.