Basic explanation of why the email indictment is a total fantasy.
Government officials don't use email for classified information. Not state.gov, not aol, not private server, it's all considered insecure. There's a whole other system for that. Multiple ones actually. You go into a special room and use a secure dedicated network and all, it's movie stuff.
Since classification is a bureaucratic mess, upon review some retroactively classified stuff ends up in email. Whether it's a private server, AOL, or state.gov doesn't make much difference, classified info shouldn't be there, but it gets there.
It happened with Rice's and Powell's AOL or yahoo accounts. It happened with Clinton's private server. It's surely happened with Kerry's state.gov account. And it happens with tons of other people you never heard of and nobody cared.
Nobody gets indicted for this. It's not a crime, there's no intent, the info wasn't considered classified at the time, at least not by State, in some cases the info is forwarded to you which means there's nothing you can do about it. It's a big nothing.