many of these methods will only work for very unique names (or domains). just because an email exists, doesnt mean it's the person you're looking for. ironical

many of these methods will only work for very unique names (or domains). just because an email exists, doesnt mean it's the person you're looking for. ironically, john.doe@common-domain.com will never reach a person actually named john doe. i remember http://en.wikipedia.org/wiki/Finger_protocol http://en.wikipedia.org/wiki/Finger_protocol which was open for business on many servers in the 90s, could get a person's info by their email, etc.