All that's required is this: "(a) Whoever knowingly and willfully communicates, furnishes, transmits, or otherwise makes available to an unauthorized person, or publishes, or uses in any manner prejudicial to the safety or interest of the United States or for the benefit of any foreign government to the detriment of the United States any classified information—
It wasn't confidential information, some of it was TOP Secret. You don't know if the server was secure or not. You also don't know if it was compromised or not. There was potential it was. That's all that's required.
In what bizzaro world does everyone admit to wrongdoing, especially crooked Hillary. Of course, she didn't admit it. Obama said there was nothing to it.. Loretta Lynch referred to Comey as if he was her boss. It all smells like rotten fish...
Now, tell me what Petraeus did that was so different.