But you may have already seen them
I know I've seen that more than once but can't remember where. I'll look for it.
It would seem to me that if Blumenthal had classified information he sent to her on email it would be the fault of whoever gave him that information in the first place, and it wasn't Hillary. Why DID he have classified information to send to her? I'm not entirely sure how that happened, or if it was classified later.
I assume you've seen this?
https://www.hillaryclinton.com/briefing/factsheets/2015/07/13/email-facts/
A portion of this article deals with classified information in a separate system:
http://www.latimes.com/politics/la-na-pol-prez-clinton-emails-q-and-a-html-htmlstory.html
Technically, messages from the classified system cannot be sent electronically to unsecured accounts. But it would be possible for someone to hear classified information in a secure briefing and type that into an email on an unsecured account. It is also possible for an official to obtain information from nonclassified sources that the government considers classified a situation that security experts refer to as "parallel reporting."
(There is also a small portion of this article that refers to the Blumenthal issue.)
This is such a complicated subject and nothing will convince those who hate her anyway, but the emails are going through various departments and each has things they don't want in the public domain, so they mark them "classified" to keep places like Judicial Watch from getting them. That's hardly the fault of Hillary Clinton, though.