Why don't I get new message notifications? - Microsoft Support
By default, notifications will only appear for new messages in the Focused Inbox. If you want to be notified of all new messages: Within our app, tap Settings. Under Mail, tap Notifications. Change Mail Notifications per account to All, Focused Inbox Only, or None. You may also need to change your setting in the Android System for Notifications.
Applies To:
Outlook for Android, Outlook for iOS
當您使用 Outlook 或 Outlook Express 傳送或接收電子郵件訊息時發生錯誤 - Microsoft 支援服務
解決方案. 如果要解決這個問題，請使用下列一或多種方法。. 完成每個方法之後，傳送測試電子郵件給自己，以確認您可以傳送與接收訊息，而不會收到錯誤訊息。. 如果您仍然收到錯誤，請嘗試下一個方法。.