Peepmail is a search engine that delivers someone's business e-mail, even if that e-mail address is not published publicly. To use it, just enter the person's name and the business domain where they work.
Anytime you run into a tool like this, it's always a bit of a crapshoot as to how accurate or effective it might be. I plugged in a dozen names and businesses, and found it gave correct data for 10 of them, which is a score of 83%. That's not bad, though I wish it were better. On the other hand, the service is honest when it doesn't know; I tried the domain for a very small company and the site apologetically said that it couldn't search e-mail addresses on that domain. Tat means it doesn't just "guess" when it doesn't know the right answer.
Peepmail is a small, tactical tool for a very specific problem -- but one I encounter more frequently than I'd like to admit. It's a good site to bookmark for such occasions.
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