answer:I don’t know of a yellow pages for email exactly, but a couple of things that might help. > If you know where they work, most places use a pattern for everyone, something like <first initial><lastname>@company.com or <first name>.<last name>@company.com – if you already have their name, usually a few tries will get something to them > facebook (and other social sites) are great for this, you can look up the person and send them a message through the site, usually it’s connected to their email or at least they’ll be notified next time they log in