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Hi. I am very sorry to say that this kind of email is not possible to know. At the moment one of his many email is known to the public (and this is a public space) it will be void and replaced with another.
Also, rich person have assistants and entourage that filter contact and you will have to pass trough them if you want to contact him (the best is going trough one of his many companies).
As for email, i doubt he even have one, those are very insecure for the type of business he carry.