I guess I don't understand what the implication here is that makes this "news".
When the FBI went looking for her deleted emails they looked through Obama's email and found some.
Which means they emailed each other? Is there more to it than that?
I think it is absolute proof that Clinton destroyed evidence and deleted emails that were clearly not personal, if they are going to the President of the United States.
But, I'm not sure that's news as everyone has known she was obstructing justice and destroying evidence, but we live in a system where the laws don't apply to Democrats.