Why is the IRS retrieving this info— congress should get full access to get these themselves. This is all government information that congress should have full access too. If they are worried about sensitive tax info then have the people cleared in a way where that isn't an issue. We let the hacks that work in the IRS look at the stuff I am sure there are others that have much more integrity.
The IRS works for the government and they are treating them like they have rights-they do not.
Can the House get a search warrant? Take their own IT guys and find out where the emails are stored, etc? These files do NOT belong to the people in these offices. The people they should be asking are the IT people, and the IT people should be the ones who get and respond to the subpoena.