LOL at the DOS, talk about a set of regulations so far out of touch with reality. Other government agencies have far more strident rules on using IT platforms for official government business that are not managed by Federal IT departments. Shocking, but not surprising. What a bunch of amateurs.
To have this simply fall back on record keeping is laughable. Wow, edn Whack-a-Doodle, it must feel really good for you to know that the Democratic front run would so blatantly mishandle DOS IT operations and know that the most limp wrist-ed sections of Federal law apply.
The probability that she was hacked are about as close to 100% as you can't, intel agencies and other bad guys feast on these type of IT environments, rank amateurs can hack what she had.