1. Open Outlook Express by double-clicking your "Outlook Express" icon on your "Desktop" or by clicking the "Outlook Express" icon from the start menu.
  2. Select "Blocked Senders..." from "Message Rules" under the "Tools" menu.
  3. To add an email address to the "Blocked Senders List" click "Add...".
  4. Type in the email address or domain address you would like to block and click "OK".
  5. When you are finished adding email addresses or domains to your blocked senders list click "OK" to close the "Message Rules".