Android 8 (“Oreo”)

ZTE
unofficial

Notifications, background tasks, automatic synchronization or alarms do not work correctly for “K-9 Mail” on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “More”.
  3. Choose “Battery”.
  4. Choose “Power saving mode”.
  5. Change this to “Off”.
  6. Leave by pressing ○ (“Home”) at the bottom of your device.
  7. Open “K-9 Mail” on your device.
  8. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Power saving management”.
  3. Choose “K-9 Mail” from the list of apps.
  4. Change this to “Off”.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.
  6. Open “K-9 Mail” on your device.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Power saving manager”.
  3. Choose “Whitelist”.
  4. Choose “K-9 Mail” from the list of apps.
  5. Change this to “On”.
  6. Leave by pressing ○ (“Home”) at the bottom of your device.
  7. Open “K-9 Mail” on your device.
  8. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. At the top, select “All settings”.
  3. Choose “Power manager”.
  4. Choose “Power management for apps”.
  5. Choose “K-9 Mail” from the list of apps.
  6. Next to “Disallow autostart”, “Allow screen-lock cleaning” and “Allow deep sleep”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.
  8. Open “K-9 Mail” on your device.
  9. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. At the top, select “All settings”.
  3. Choose “Power manager”.
  4. Next to “Smart power-save” and “Ultra Power Saving Mode”, make sure that the switches are turned off, i.e. with their knobs or handles at the left.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.
  6. Open “K-9 Mail” on your device.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open “Power saving housekeeper” on your device.
  2. Choose “Auto-start application list”.
  3. Choose “K-9 Mail” from the list of apps.
  4. Change this to “On”.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.
  6. Open “K-9 Mail” on your device.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open “Palm Manager” on your device.
  2. Choose “Cleanup acceleration settings”.
  3. Choose “K-9 Mail” from the list of apps.
  4. Add the app to the “Protection whitelist”.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.
  6. Open “K-9 Mail” on your device.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open “Palm Manager” on your device.
  2. Choose “Settings”.
  3. Choose “Lock-screen automatic cleaning”.
  4. Change this to “Off”.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.
  6. Open “K-9 Mail” on your device.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Apps & notifications”.
  3. Tap on “See all … apps”.
  4. Choose “K-9 Mail” from the list of apps.
  5. Choose “App notifications”.
  6. At the top, make sure that the switch is turned on, i.e. with its knob or handle at the right.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Users & accounts”.
  3. Next to “Automatically sync data”, make sure that the switch is turned on, i.e. with its knob or handle at the right.
  4. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Apps & notifications”.
  3. Tap on “See all … apps”.
  4. Choose “K-9 Mail” from the list of apps.
  5. Choose “Permissions”.
  6. Make sure that all switches are turned on, i.e. with their knobs or handles at the right, unless you have any specific objections.
  7. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Battery”.
  3. At the top right, tap on ⋮ (three dots) to open the expanded menu.
  4. Choose “Battery optimization”.
  5. In the drop-down list at the top, switch from “Not optimized” to “All apps”.
  6. Choose “K-9 Mail” from the list of apps.
  7. Switch from “Optimize” to “Don’t optimize”.
  8. Tap on “Done”.
  9. Leave by pressing ○ (“Home”) at the bottom of your device.
  10. Open “K-9 Mail” on your device.
  11. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Battery”.
  3. Next to “Battery saver”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
  4. Leave by pressing ○ (“Home”) at the bottom of your device.
  5. Open “K-9 Mail” on your device.
  6. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. Open the “Settings” of your device.
  2. Choose “Network & Internet”.
  3. Choose “Data usage”.
  4. Tap on “Data saver”.
  5. At the top, make sure that the switch is turned off, i.e. with its knob or handle at the left.
  6. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. There are many apps on the app store which claim to boost performance, free up space, save battery, or optimize the RAM of your device. However, these apps interfere with other apps, like “K-9 Mail”, and prevent them from working correctly.
  2. If you have any app like “Clean Master”, “Security Master”, “Task Manager”, “Phone Cleaner”, “Super Cleaner”, “Power Clean”, “DU Cleaner”, “DU Speed Booster”, “CCleaner”, “AVG Cleaner”, “Avast Cleanup” or “Norton Clean”, check that it doesn’t block or terminate “K-9 Mail”.
  3. If unsure, consider uninstalling the app claiming to “clean” or “boost” your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?


  1. If you’ve made any changes based on the advice above and you’ve adjusted the settings of your device, proceed with the next step. Otherwise, there’s nothing left for you to do.
  2. Restart your device once. You can either choose the “Restart” option directly, if available, or turn off your device, wait a few seconds, and then turn it on again manually.
  3. Open “K-9 Mail” once on your device – by tapping on “K-9 Mail” on your home screen or in the list of all apps.
  4. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 8 (“Oreo”)?