queation about the Device Notification Options settings

[Rno]

I have a bad feeling about the setting 'Device Notification Options' -> Enable Notifications

on the help it said Dead/Recovering notification.

Why it's thold that monitor the status of a host, instead of monitor ?
So is monitor useless ?

And I had a problem saturday Cacti lost for 10 minutes the connection to my 1'100 devices, and now I'm getting over 60'000 email about device back up! A little way over what can be resonably consider normal.

So how to solve this issue, and can you separate the dead than the recovery email ?

And what about give back to monitor to do the monitoring, and Thold doing the Threshold ?