The eNotify Email Server must be running in order to generate email notifications, use the Template Designer, or any part of eNotify. The Server can be stopped and started from StarShip Server Manager. You'll find it under Tools > Options > Server Options > eNotify.
There are three possible states for the eNotify Email Server, shown here in the StarShip Server Manager :
If the eNotify Email Server is not running, click Start eNotify to start the Email Server.
When the eNotify Email Server is started, you'll see this message. To stop the Email Server, click Stop eNotify.
If you're registered for the eNotify option, but see this message, the eNotify Email Server is not installed on the current machine. Contact Technical Support using the information provided.