Problem with email notifications in Android cellphones

Problem with email notifications in Android cellphones

The last month me and my colleagues are facing an issue with the Zoho Mail application in our Android mobiles. We do not receive pop notifications that we have new emails.

Only if we access the application we can check if we have something new. We have tried to reinstall the application but the problem still exists.

Is it a Zoho app problem or maybe we have missed an Android setting? Do you have same issues?