Awesome!

Well… That is the way Google is supposed to work : if you add a new service, you receive an alert email. What is the problem ?

This is absolutely normal. And when your host is in another country, different from what you usually use gmail, you will receive an even scarier email. But this is a protection for you. If you want more security might be better to use another authentication method like OAUTH2.

This is normal as Google sees that you are logging in from a different IP. I recommend changing your uncalled-for rating on this plugin.