- Begin by opening up Windows Live Mail 2011. Click on the "Windows Mail" button and select "Safety options..." from the "Options" menu.
- The "Safety Options" window will now appear. Select the "Blocked Senders" tab.
- To add an email address to the blocked senders list click "Add...".
- Type in the email address or domain address you would like to block and click "OK".
- When you are finished adding email addresses or domains to your blocked senders list click "OK" to close the "Safety Options" window.