At the bottom of my Gmail, there is a link to show the history. I realized there was someone from the US going on my account, but when o changed my password they still had access. Is this just part of the system? The User changes IP addresses every time they use my account. I haven't noticed them doing anything, so should I be concerned? It usually looks like this: Authorized Application (-numbers here-.apps.googleusercontent.com) with numbers before the .apps.