Of course it has to be the default mail app for most Gmail users, when the issue comes about such a monopolistic service, issues must be taken care at utmost priority. The issue is, I never receive any notification until I open the app for any work. Once I open the app I get showered with all the notifications which date nowhere around today. If this continues to happen I would missout mails with life and death importance. All this despite all of my notifications turned on for the app.