Could it be that i`ve missed something so simple? Let me explain! Does the Inbox have to be open for the New Mail Notification sound to be heard. I`m just experimenting now by not having the inbox open and sending an email to myself and having another folder open e.g. "deleted items or sent items", because on a couple of occassions the notification has sounded with the inbox open and not sounded with another folder open instead of the inbox.