What mode should be turned off to ensure proper email functionality?

To ensure proper email functionality, Airplane mode should be turned off. When Airplane mode is activated, all wireless communications on the device are disabled, including Wi-Fi, cellular data, and Bluetooth. This means that any attempt to send or receive emails will fail because the device cannot connect to any network. Disabling Airplane mode allows the device to establish a connection to the internet or cellular network, enabling email functionality.

While Do Not Disturb mode can silence notifications and calls, it does not affect the ability to receive emails. Similarly, Low Power mode reduces background processes and might slow down some operations, but it still allows email connectivity as long as the device is connected to the internet. Night Shift mode adjusts the screen colors to reduce blue light exposure at night and does not impact email functionalities at all. Therefore, turning off Airplane mode is crucial for ensuring that the device can access email services properly.