Fix BlueMail push notifications on any Android phone

BlueMail needs Android 9 (Pie) or newer. On any phone running it, four settings decide whether mail arrives when it is sent or when you next open the app. Manufacturer-specific guides are listed on the Push Settings page; start here if your phone is not one of them.

1. Battery optimisation

Settings → Apps → BlueMail → Battery → Unrestricted (wording varies: “Don’t optimise”, “No restrictions”, “Allow background activity”).

This is Doze, the system that suspends network access for apps the phone thinks are idle. It is the single most common cause of late mail.

2. Adaptive Battery

Settings → Battery → Adaptive Battery.

Adaptive Battery sorts apps into standby buckets by how often you open them, and demotes the ones you don’t. A mail app read from the notification shade looks unused by that measure.

3. Background data

Settings → Apps → BlueMail → Mobile data and Wi-Fi.

Allow Background data, and allow Unrestricted data usage if you use Data Saver. Battery Saver applies the same kind of limit when the battery is low.

4. The notification permission

Settings → Notifications → App notifications → BlueMail.

Android 13 and newer ask for notification permission when an app first runs, and it is easy to dismiss. Confirm notifications are allowed and that the mail channel is not set to silent.

Two habits that undo all of the above

• Clearing Recents. Swiping BlueMail away closes it. Lock it in Recents instead — long-press the card and choose the padlock or “keep open”.
• “Put unused apps to sleep.” Several manufacturers re-apply restrictions to apps you have not launched for a few days, which is why the problem returns weeks after you fixed it.