I ran across this site in an article I was reading today. It's supposed to verify if your email address has been part of any data breach. I stuck a recently disused address in and it came up with a hit, but you have to be registered to see details.
I was wondering if anyone has used this site? I was hesitant to sign up and use current email addresses without further verification of site integrity. It was in a Kim Komando article, and I think she's pretty good about verifying stuff, but I'm paranoid about my main email address. :)
https://haveibeenpwned.com/