I have a galaxy s7 and my emails won't auto sync, I have Gmail app, bluestacks email app and the system email app and none of them will auto sync. I have the master sync turned off as I don't trust Google with syncing my other stuff, I only want to receive auto push email notifications, even downloaded other playstore email apps with no joy. I don't know why they don't give us the choice to have master sync off and still receiving emails, it worked okay on my galaxy s4. I may be missing something, thanks for any help with this.