I have recently installed the BT Email app on Android but the notifications aren't working. I don't get anything when a new email arrives. All my settings in the app are on for notifications. Any suggestions?
Ditch the awful BT Mail app and download Blue mail.
If you check the reviews on the BTMail app download page you will see that there has been issues with the notification and that it should be resolved in the next update.
You can contact BTMail app at