Maybe the RNC can help. They know a lot about losing emails...
Not to spoil the party with reality, but....the IRS only kept six months worth of backup tapes. They do have a policy for keeping hard copies of "official" emails, but that can be a vague standard. So when stout hearted congressional investigators asked for Lerner's emails, the IRS tapes only went back to late 2012.
The IRS uses Outlook, and users are only allowed 500MB of server space. So many people therefore save emails on their local drives. But Lerners computer crashed irrecoverably in 2011, and that is documented.
So the only emails they can find are ones that either remained on others computers or exist as hard copies.
Another smoke and mirrors scandal.