To add to Bjorn's reply, Niklas, the alarm notification did not change from 3.4 to 3.5.1. If you got 17 emails, then the AP caused that event 17 times (or 17 APs had the same event). This should not be 17 notifications for a single event. If you find that the event log in the SmartZone only shows this event one time, but you still got 17 notifications, that would be a bug. Please let us know if that is your situation.