Ok. Now did the White House, Democratic members of Congress, the Treasury Department, FEC and Department of Justice also experience a "computer crash"? Because all of the messages in question would also be on their servers. Too bad nobody in congress knows how email works.
There were senders and there were recipients. In order for the emails to be "lost", servers on both ends of the communications would have to have crashed simultaneously - for two years.
Seems like someone in IT would have noticed. But given the dearth of IT specialists in DC, maybe not.