Just an FYI for a situation like this in general: If you are asking me to give out emails, then I'm probably going to say no. Emails are personal information so I'm not comfortable giving them out unless there is a very good reason. And no offense to the OP, but I wouldn't give it out to someone who has just recently joined and has few posts unless it's a REALLY good reason.
I don't want to set the precedent that it's "okay" just to ask for someone's email because "oh i knew them from x game from 5 years ago". I'm sure there has to be someone who knows more information, it would be better to ask someone who knew him personally (if not here, you can try the private server forums, you may have better luck there). Good luck on your search.
That being said if there's a legitimate reason go ahead and shoot me a PM.