Sweden here....my Hikvision notifications/GMAIL stopped at 18 nov 2016....been working for around 1 year without any problem, and did no changes!
Pulling my hair over this......i have a chinise imported cam, so no firmware upgrade avalible (that i could find)
SOLUTION for me...and for many...
Had my hikvison ip cam, DS-2CD2035-I, now for a month or so.
I have set up the email and everything works fine, getting all the alerts.
But then this have happend to me twice, i notice that i didnt get any alert in my inbox.
Log in to the webinterface and all email settings was gone, AND even...