How to Enable Notifications on YouMail App

In order to receive push notifications on your Android, you must enable push alert notifications on your YouMail account.

Turn on Notifications Via the YouMail app

From the app, tap the Menu (☰) icon in the top left corner of the screen
Tap on Settings
Tap Notifications
After tapping Notifications, enable New Voicemail and any other desired alerts.
Toggle on All YouMail Notifications

How to Enable YouMail Notifications on your Android Phone

Tap the Android Settings app
Scroll down and select Apps
Scroll down and select 'YouMail' from the list of apps. Then, select Notifications and toggle all options ON

Enable Push Alert Notifications on Your Android