Time-Immemorial
This is actually a felony.
http://dailycaller.com/2016/10/21/unquestionably-an-opsec-violation-clinton-sent-us-operations-info-to-podestas-hacked-email/
The usual penalty: Loss of all security clearances.
https://news.clearancejobs.com/2015/07/28/opsec-violations-will-cost-security-clearance-doha-hearings/
At this point she could not even get a job as dog catcher.
http://dailycaller.com/2016/10/21/unquestionably-an-opsec-violation-clinton-sent-us-operations-info-to-podestas-hacked-email/
The usual penalty: Loss of all security clearances.
https://news.clearancejobs.com/2015/07/28/opsec-violations-will-cost-security-clearance-doha-hearings/
At this point she could not even get a job as dog catcher.