Another picture to help avoid possibly painful mistakes.
This is my Inbox with only one message displayed.
See the mouse (the pointing index finger) is floating over the first column, the Sender. And beneath the finger is a black rectangular window with white text.
When the finger floats over the Sender that black window pops open and shows the email address the message is supposedly from. It is very obviously NOT the Apple App Store. Mark this message as SPAM and delete without opening!
