Open Web.config and comment out the element (select the entire element and
then press Ctrl+K followed by Ctrl+C). You added this element in Chapter 9 to confi gure your site for sending e-mails. By disabling it temporarily, you can ensure that no settings from the configuration fi le are used which in turn will force the SmtpClient to try to deliver the e-mail at the DoesNotExist server which obviously will fail. Save the changes to the fi le, but keep it open so you can easily undo this change in a later step.