So How Much Email is Really Saved?

So a few weeks ago i wrote a blog post about your emails and how private they really are and in the end emails relaly get svaed to a huge document and are really never deleted...But how true is this? The article (http://www.cnn.com/2007/POLITICS/04/13/white.house.email/index.html) on www.cnn.com shows that many emails that include emails on very important topics show as the cia leak may be gone forever...These emails sent in the past few years already gone forever? Come on the goveremnt doesnt even save there own emails cause we know that they are saving ours...Some other emails that are missing including the karl rove issues...For all of you who didnt hear Karl was the center of a huge protest at American Univeristy (http://www.nbc4.com/news/11516096/detail.html) and these emails may be the answer but where are they?