Email Sherlock is reverse lookup for email addresses–enter the email address in their search bar to find out who owns it.
What you need to know about EmailSherlock
Email Sherlock is basically a search engine, and as such will not remove information from its site unless the information is out of date. If searching for your email address exposes you social networks, log into each of your social networking accounts and change your privacy setting so that your email address is private. This will hide the information from Email Sherlock.