How to use remote signout feature in Gmail
While going through the Gmail blog I came across this tutorial by Erwin D’Souza, Gmail Engineer,which helped in enriching my knowledge.
At the bottom of your inbox, you’ll see information about the time of the last activity on your account and whether it’s still open in another location
You can see more details about your account activity by clicking Details link:
The top table, under “Concurrent session information,” indicates all open sessions, along with IP address and “access type” — which refers to how email was retrieved, for example, through iGoogle, POP3 or a mobile phone. The bottom table, under “Recent activity,” contains your most recent history along with times of access. You can also view my current IP address at the very bottom of this window, where it says “This computer is using IP address…”
With this information, you can quickly verify that all the Gmail activity was indeed yours. You can also click on the “Sign out all other sessions” button to sign out of the account you left open somewhere else.