Another one. This doesn’t sound like personal email, but business email. Should have gone through their .gov addresses.
https://wikileaks.org/podesta-emails/emailid/34523
On that date did Podesta have a .gov address? If not then it was a private citizen to a Cabinet Sec about a future position. No if and I say if that was the case, the use of private email was more than appropriate it was correct.