To ensure emails are syncing across all devices, start by ensuring the email app on each device is up to date. The latest version of the app may include essential features or bug fixes.

Next, ensure the server settings are correct on each device. The server settings vary depending on the type of email account and email address. Many services can be found on the device’s email app, however, some may need to be manually entered.

Third, ensure that all devices are connected to the same Wi-Fi or internet connection. This will allow the devices to communicate and sync emails across them. Finally, check the synchronization setting on the device’s email app. This will allow emails to sync automatically across all devices.

1. Update the email app on each device
2. Ensure server settings are correct on each device
3. Ensure all devices are connected to the same Wi-Fi or internet connection
4. Check the synchronization setting on the device’s email app