Michel,
I would not normally have many power outages, and I am using a UPS, but in both cases, due to construction, it is certainly possible that entering safe mode occurred after a reboot of the ISY. That said, my point remains. Part of the reason I am using the ISY is to provide remote management of my houses, and for that function, it is important that notification be available, even when the event is rare. Another point is that PLMs go bad after a few years, and that is another rare event that also requires remote notification for the remote use model. So I would ask that you consider adding email notification of loss of communication with the PLM as a optional feature. I would think that the event would need to be triggered by loss of communication with the PLM over some time interval, maybe 15 minutes. The duration of the persistence of the outage could be made a parameter that the user specifies.
Bill