"Here's my personal email," Hillary Rodham Clinton wrote to U.S. special envoy George Mitchell on a summer Sunday in 2010 as he telephoned one European official after another in an effort to keep peace talks between the Israelis and the Palestinians on track.

"Pls use this for reply," Clinton wrote in her email, sent from the clintonemail.com account she set up on an unsecured, private server in her New York home for her work as secretary of state.

Over the following hours, Mitchell wrote back to Clinton with summaries of his conversations, including one with Spain's foreign minister, who had briefed him on discussions with Palestinian leaders. The State Department has redacted the summary of the minister's thoughts, saying it is classified information.