While a hacker cant login to any of your accounts unless they have your password, email address hacking gives them an easy way to target you with phishing attempts and malicious attachments that can help them figure out your password.

What happens if someone knows your email?

If a hacker wanted to try breaking into one of your online accounts, knowing your email address is a solid first step. Obviously, they cant log in without your password, but by knowing your email address, they could target you with phishing emails – malicious attachments that install malware on your machine.