Every time I try to add, view or edit an email action, I get the following error message "Unable to enumerate Dial-Up Networking entries due to error 711". I am not interested in the remote access connections.

This error is being displayed because remote access connections, which are available for selection on the SMTP action dialog, cannot be enumerated.

You should be able To avoid this error message by ensuring that the "Remote Access Connection Manager" service is running.