this site have been recommended on several tech sites.
http://www.tomsguide.com/us/gmail-pa...ews-19503.html
You can use a site called, appropriately enough, "Is my email leaked?" if you'd like to see if your Gmail, Yandex or Mail.ru address is on the list. The site itself is safe, and you can even give a shortened version of your email address with asterisks if you're concerned.
only one of my gmail accounts was there with the password. It was my throwaway account and I figure they got it from a site where you can sign up by clicking signup with my gmail info. That how they must of got them because that's the only address I do that with and that was the only one hit.