So you are proposing confidential belonged in a fax? Or everything classified and above? or just top secret?
Sounds to me like they should have just faxed everything.
Not sure what he's saying, but just to be clear:
"Classified" is not a classification; it is merely a descriptive.
Confidential, Secret, and Top Secret are classifications. All of them will frequently have further markings such as NOFORN (Not for Foreign Dissemination), and Top Secret will almost always have a follow-on codeword to designate SCI/SAP.
When I was in Military Intelligence, if I had taken a comic book page and stamped "Confidential" on it, it would, in fact, be classified until I went through the process of declassifying it (it would be far easier simply to shred the page).
Such authority does not, however, extend to civilians. This is part of the confusion with what Blumenthal sent. He marked a lot of his stuff "Confidential" but that did not automatically classify it because he had no official capacity to do so, and so while the content may indeed have been Confidential it would not have been so by virtue of Blumenthal's marking it as such.
Which gets to how classified information should have been communicated. Anything that was actually classified at any level should not have gone onto HRC's email server. Any that happened to be sent to her via that server (sorry if I'm getting the tech terms wrong; I'm a good computer user but not a good computer understanderer) and which would reasonably be seen AT THE TIME as containing classified material should have been handled appropriate to their actual classification whether marked as such or not.
Again, I refer to Grizzly Bear's posts.