WASHINGTON — A string of emails that has been provided to the State Department raises new questions about whether Hillary Rodham Clinton has accurately described her use of a personal account when she was secretary of state.

Mrs. Clinton has said that she retained no emails from her first two months in office because she used an account that she no longer has access to. She has said that on March 19, 2009, she began using the personal account — hdr22@clintonemail.com — that she relied on for the rest of her time in office.

But on Friday, State Department officials said they had been given copies of an email chain between Mrs. Clinton and David H. Petraeus, the commander of United States Central Command at the time, that shows that Mrs. Clinton was using the hdr22@clintonemail.com account by Jan. 28, 2009.

The chain, with emails from Jan. 10, 2009, to Feb. 1, 2009, was provided to the State Department by its inspector general and by the Defense Department, according to State Department officials.