I'm not sure whether "Request for documents" and "Confidential ethics investigation" are really there, but even if they are, they may still be personal email.

I'm not sure whether "Request for documents" and "Confidential ethics investigation" are really there, but even if they are, they may still be personal email. "Request for documents" could be any kind of request for documents. Maybe it's the McCain campaign doing some vetting. Maybe it's some journalist requesting a copy of Trig's birth certificate. I actually think it's unlikely to be official business -- if you need documents from the governor's office you probably request them from a low-level official, not from the governor herself. "Confidential: ethics investigation" could be personal too -- if she's under investigation and has hired a lawyer, for instance, then communications with that lawyer should be protected under client/lawyer privilege and shouldn't be a matter of public record. I"m not sure exactly where the dividing line is between personal and official email for government officials -- I expect it's blurry, having been defined in a law somewhere but never tested in court.