if you notice unfamiliar activity on your google account gmail or any other email product there are chances that someone else might be using it without your permission if you think your google account or gmail or any other email id has been hacked follow these stepscheck which all devices recently connected to your account make sure you check across form factors meaning smartphone laptop and pcreset your password and make sure that it is strong and hard to guess make sure you change it at all the places in case you use it for more than one account report the incident to the company whose email product you are usingnotify everyone on your contact list that your email has been hackedif you dont mind losing the email address the best thing to do is to close it down and open another one enable 2step verification to protect your account from unauthorised access due to a compromised password the 2step verification helps keep hackers out of your account with 2step verification you sign in with something you know your passwordn something you have your phone a security key or a printed code this way if your password is stolen your account is still securescan your computer for malware and check if anything else has been hacked give your device a thorough virus scan with comprehensive online protection software to ensure that it is free from malware set up a regular scan to run automatically if you havent already this will help keep things clean in the long run remember the security questions with answers you used at the time of registration this may help you regain your account