Beneath this main switch, review the Alert Style; it should be set to "Banners" or "Alerts" rather than "None". Background App Refresh On (for email app) Allows the app to fetch new data without opening it.
Check Background App Refresh and Notification Settings
Show Previews Desired setting (Always/When Unlocked) Controls how much content is visible on the lock screen. Here, you have two options: you can allow the feature to run for all apps, or you can customize the list and ensure your specific email client is toggled on.
Without this background refresh, the device relies on manual checks, meaning messages sit on the server until you open the app yourself. For reliable delivery, you generally want this enabled for both Wi-Fi and Cellular data, as modern push services utilize both pathways to reach your device instantly.
Configure Background App Refresh for Email on iPhone
Diagnosing the specific cause requires a systematic review of how your phone connects to the digital world. This setting is a common culprit for delayed or missing notifications.
More About Why am i not getting email notifications on my iphone
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