The first Outlook Send/Receive resulted in all the gmail boxes failing. And my recovery email box received a Critical Security Alert saying a Sign-in attempt was blocked. Then Someone just used your password to try to sign in to your account. Google blocked them, but you should check what happened..
I also got a popup about this. As it was all OK I clicked that it was OK and there's been no further such messages.
I thought it may be that gmail monitors IP addresses and a new one causes it to block. However this morning when I had to reboot the hub the IP address changed and gmail was quite happy about it.
Made we wonder what it is that alerts gmail to a possible email account hack attempt.
We have more and more laws, and less and less enforcement