I have upgraded from ipad 1 to ipad mini. I never could hear the alerts for emails received on my ipad 1. I have an iPhone and they work ok on that and I can't see that any of the settings are different. I thought there was a problem with my ipad 1 but having loaded all my stuff firm iTunes it still does not work on my mini. I get volume fr music videos etc and the volume button is on maximum. My husband has an ipad 2 and he gets a sound when an email arrives and as far as I can see all the settings are the same.