Your Gmail account could be hijacked or viewed by someone else. So it’s nice to know from where it’s being accessed.
You can do this with a handy-dandy feature in Gmail, located at the bottom of the Gmail page:
Click “Details” and you get an overview of your accounts activity, including whether it’s from POP, a browser, or a mobile phone:
Very useful.
Alex Eckelberry
(Hat tip to Micheal Espinola)