In this section of the Server set properties dialog, you can specify how to be notified of problems / events related to this server set:
Use default notification methods (configured in Options dialog)
Enable this to send notifications for this server set using the default notification methods configured in the Options dialog / Notification section.
Notify of problems/events using the following methods (for this server set only):
List of notification methods for this server set.
Use the Add button to add a new notification method - see Notification properties dialog.
Use the Edit button to update the properties of the selected notification method - see Notification properties dialog.
Use the Remove button to remove the selected notification method.