how to check if your email was leaked

You can check if your email has been leaked by using free, reputable data breach search engines that scan databases of known incidents.

Use reputable breach checkers. Use established services like Have I Been Pwned to search for your email address. These tools are free and do not require you to provide your password.
Check multiple sources. Since no single database holds every breach, running your email through two different reputable checkers provides a more reliable assessment.
Monitor for signs of hacking. Look for signs of unauthorized access, such as unexpected password reset emails, changes to account settings, or emails in your sent folder that you did not write.
Take immediate action if leaked. If a breach is confirmed, change your password immediately, enable multi-factor authentication, and review your account for unauthorized changes.