Swipe up from the bottom of the screen (or double-click the Home button) to view open apps, then swipe up on the Mail app to close it. Reopen the app and try downloading again.
If the problem persists, you may need to reset more core functions. This message has not been downloaded from the server. iphone mail tap to download not working
Go to Settings > Apps > Mail > Mail Accounts > Fetch New Data. Ensure "Push" is enabled or that the "Fetch" schedule is set to a frequent interval (e.g., Every 15 Minutes). Swipe up from the bottom of the screen
Ensure you have a stable connection. Toggle Airplane Mode on for 10 seconds and then off to refresh your cellular or Wi-Fi signal. iphone mail tap to download not working