As a security measure, Gmail tracks all Internet Protocol (IP) addresses that access your account. The Gmail IP Address Tracker sends you an alert when it detects an unknown and suspicious IP. If you use a personal account, these alerts can warn you about unauthorized activity. If you share the account with several colleagues at work, the tracker may erroneously conclude the account has been compromised, particularly if team members operate from distant locations. You can disable the tracker for such accounts to escape the needless alerts.
Open Gmail in your Web browser and log in to your account.
Scroll to the bottom of the Gmail page.
Click the “Details” link on the right side of the page to open the Activity Information window.
Click the “Change” link at the bottom of the window.
Click the option button labeled “Never show an alert for unusual activity.”
Gmail takes a week to update your tracker settings.