Yes, this would be very useful!
I would love that too!
That is something I very much want - I plan to use my sonoff to monitor the temperature in my second home (in another country). If the temperature gets low enough to risk freezing pipes I would like a warning email or whatsapp message so I can ask a friend to visit and check that the heating switches on properly.
Come on Itead, let's make this happen.
Agree. Having Ewelink provide a "scene" that includes sending an email alarm would be ideal.