To add more security to your email accounts, Google Gmail recently included Account suspicious activity warning alerts.
It will give alert when your account is under the attack of spammers. If you visit your Gmail inbox then you can easily see the last login IP address details. Just browse to the bottom of the page.
It tells the last login IP country location along with duration.
This new feature is also based on this method. It checks the location of your last few hours session and if it detects any suspicious changes then it generates the warning.
I think its a great feature and it will made more protection and security because many of us don’t check our account activity.
Remember Never share your Login details with other sites.
Also read Hide email from Spammers and Hackers and Tips to protect your all email accounts.

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Seems a nice addition by gmail, security should never be neglected