25 years ago, when email and internet were fairly new, they found a way to dig up Oliver North's emails on a server. I would like to think that now, with a couple of decades of experience with computers, IT, and backup systems, there should never be lost emails, especially for an agency involved with finance and law-enforcement, such as the IRS.
Saying that the emails were lost is the modern-day equivalent of "the dog ate my homework" excuse. Lame.