How to mine for email addresses

[cdnbigd]

Hey Guys,

I know there must be a few tools/sites out there which help you mine for email addresses by importing a list of websites URLs. What are your favorites? Any suggestions?

I have lists of URLs and rather then going into whois or searching through their internal links to find the email, I'm hoping to get a program/site which will let me find the emails for a bulk number of URLs.

Thanks!
Dan