If you see alerts for emails that end up in @SaneLater, you probably have your Push setting enabled on your phone. This results with the email being pushed through quicker than the message is filed.
Method 1: Disable Notifications from the Settings App
Open your App Drawer and tap on “ Settings”
Tap on “Sound and Notification”
Tap on “App Notifications”
Tap on your default email app
Toggle on the option to “Block All” notifications from this app
Method 2: Disable Notifications from Specific Apps
If your app is not listed here, please reach out to our support team here: firstname.lastname@example.org.