The best way to tell if someone else has used our account is to scroll down the Gmail inbox and look for “Last account activity” in the bottom right. It doesn’t mean they have accessed my account. I’ve had emails from Instagram, GoCompare, Barclaycard Business, Apple, Prattville YMCA and many other organisations where people have entered my Gmail address, probably by mistake.
However, incoming emails are not an indicator. There might be emails in the Sent Mail folder that you didn’t write, though hackers can cover their tracks by deleting copies of sent emails. How do I stop her?” I don’t recall getting these queries about other email services. How do I get rid of him?” from Rodimus Ghost, and “My daughter is using my Gmail account.
Other recent examples include “Someone is using my Gmail account to steal my data on a game.
I think someone I know has hacked my Gmail account.