I know there is a similar question, but it seems that on-screen alerts are supposed to be built into the Notifications Settings and that using a third-party app should not be necessary. Even though I have alerts selected (the three options are none, banner, and alerts) in Settings > Notifications > Mail, they do not show up. Any thoughts on why?
In addition to the
Otherwise you will only see them when you are using the phone at the time that they come in, and if you already have Mail open, then they won't appear at all.