How do I find truly free email search engines?

This used to be so easy, now it seems like there are a thousand scams and redirects. How do I find an email address for free? I don't want to sign up for an account, give them my credit card number, be on their mailing list or answer their survey. I don't want to be redirected to that Intelius crap, nor was whitepages.com any help whatsoever! Help!|||There are no legit email search engines.