Hmmmm there's only one reason why you have to be cautious about what you say in an email. Hmmm whatever could be her intent, I wonder.

..So you expect people to believe that the IRS does not use an email server and that it does not backup its email accounts on a central server which also has a backup which is a typical network setup utilized in any small to large sized organization??? The idea that a computer crashing can somehow delete your entire email history is a bunch of BS.