The emails, found on backup disaster recovery tapes, were permanently lost.
Check it out:

The IRS will continue searching backup tapes for more lost emails from Lerner and her underlings that might still exist.

“Though it is unclear whether TIGTA has found all of the missing Lois Lerner e-mails, there may be significant information in this discovery,” outgoing House Oversight and Government Reform Committee chairman Rep. Darrell Issa told the Washington Examiner. “The Oversight Committee will be looking for information about her mindset and who she was communicating with outside the IRS during a critical period of time when the IRS was targeting conservative groups.