Have I Been Pwned?

 

I have always encouraged people to check their email addresses on sites such as HaveIBeenPwned (https://haveibeenpwned.com/).  If present, your account is included in a known breach, and you should change your passwords immediately. This site has been the standard as far as reported breaches, and the owner stays on top of the latest threats.

 

 

A similar site is Hacked-Emails (https://hacked-emails.com/). Hacked Emails constantly scans paste sites and other release resources, and immediately updates its database. This may be redundant information, but the constant update could reveal a compromised account that may not be present on other similar sites. Overall, I now check both of these services regularly for any of my email addresses that may have been compromised.