Yahoo now permits you to track your past login details with IP address and location. Here is how to check your
Yahoo Mail login history. First, access your Yahoo account and click on the down arrow beside the "Hi your name" label. Now, click on the "Account Info" and "View your recent sign-in Activity" link. Now, Yahoo will show you the last login activity for your account. The information displayed includes date/time, access type, event, location, and IP address. Now, if you see any unusual or suspicious login activity, you can immediately change your password to save information from your mail getting leaked.
