You will receive a notification from your email service provider, for example, Gmail, notifying you about suspicious activity or logging in from an unfamiliar location.
you can start receiving emails that you didn't send or that contain links you didn't click on.
You are unable to log in to your email account, or you receive an error message when trying to do so.
You will notice that your email contacts have received spam or phishing emails from your account.
Your sent folder contains emails that you didn't send.
You notice unfamiliar account activity or changes to your account settings.