Thinking if I was in a position of power and these emails came out about me there would either be two outcomes / reactionary states I would take -

A) The emails are false in which I would be VEHEMENTLY denying their accuracy and figuring out a way to prove such or -

B) They're real and I would still most likely be denying them thinking to only what I would do if I were innocent (see point A) .

The fact that they haven't been denying the accuracy of the wikileaks emails makes a huge case to their validity. Great find.