Alerts and overviews for newly received emails

Whenever I receive a new email message in my Inbox, I can see the envelope icon in my Notification Area. So far so good.

However, it doesn’t reveal how many new emails I have received nor does it show when I receive a message in a folder other than the Inbox. Having that information would really help me, especially when I’m away from my desk for a while.

Is there a way to get these alerts regardless of which folder a message has been received in?