From the home tab, under the Preferences sub menu drop down, select address/email Preferences. Or, from the services tab under My Preferences panel, select address/email Preferences. Click on the Change email link in the lower right corner. From this Manage Delivery options page, click on the check box to the far right of the email address entry and click the red "x" button to delete the email address.

Note: there must always be at least one email address in your online profile. Enhanced account Protection