You're talking about a couple of different issues here. Official record retention for the purpose of storing to the National Archives rarely applies to the ema

You're talking about a couple of different issues here. Official record retention for the purpose of storing to the National Archives rarely applies to the emails of normal employees. There isn't department wide mandatory training on this because it's not really needed. Secretary Clinton would be required to archive her official email as the head of a major agency. There is mandatory training on security and handling classified materials. I'm not saying Clinton didn't receive proper training on either NARA compliance or handling classified material. It just appears that she circumvented the spirit of the archival rules buy maybe not the letter. Classification-wise it sounds like the information was not marked as classified when it was sent to Clinton. If something is changed to classified after the fact that doesn't mean the recipient of the information committed a violation. Now if it turns out Clinton knowingly handled classified materials on unclassified systems that would be a security violation. Then the question would get into intent and impact to determine what charges and punishment would be warranted. Usually there has to be some intent and an attempt to distribute classified info before jail time comes into play.