Apparently the CIA and Homeland Security email servers have been hacked (http://www.cnn.com/2015/10/19/politics/cia-fbi-alleged-hacking-report/index.html)

As a preventive measure, authorities have switched all CIA and Homeland Security mails to Hillary’s personal email server. A spokesman explained “After dedicating so many resources for so long a time, we have not yet quite figured out what was going on. Frankly, we are not even sure what we are looking for. Therefore, we figured this would be an effective method to confuse all hackers.”