We don't know the motive, but it seems at least equally plausible that this was in anticipation of responding to a discovery request that filtered on sender/rec

We don't know the motive, but it seems at least equally plausible that this was in anticipation of responding to a discovery request that filtered on sender/recipient. > The Bush administration ran private email servers to avoid FOIA requests, then nuked millions of saved emails when his term was up to avoid handing them over. Citation needed if you're going to "correct the record."