Open your device’s Settings and go to Apps.
Tap Zoho Mail from the list of apps.
Tap Notifications.
Toggle the button On to enable notifications for the Zoho Mail app.
Open your device’s Settings and go to Apps.
Tap Special app access.
Tap Auto-start
Select Zoho Mail.
Enable Auto-start for Zoho Mail.
Open your device’s Settings and go to Apps.
Tap Zoho Mail from the list of apps.
Tap Battery.
Choose Unrestricted.