The documents raised new questions about whether the charitable foundation worked to reward its donors with access and influence at the State Department, a charge that Mrs. Clinton has faced in the past and has always denied.
In one email exchange, for instance, an executive at the Clinton Foundation in 2009 sought to put a billionaire donor in touch with the United States ambassador to Lebanon because of the donor’s interests there.
In another email, the foundation appeared to push aides to Mrs. Clinton to help find a job for a foundation associate. Her aides indicated that the department was working on the request.
Mrs. Clinton’s presidential campaign, which has been shadowed for 17 months by the controversy over the private email server she used exclusively while at the State Department, had no immediate comment on the documents.
The State Department turned the new emails over to a conservative advocacy group, Judicial Watch, as part of a lawsuit that the group brought under the Freedom of Information Act.
The documents included 44 emails that were not among some 55,000 pages of emails that Mrs. Clinton had previously given to the State Department, which she said represented all her “work-related” emails. The document release centers on discussions between Mrs. Clinton’s aides and Clinton Foundation executives about a number of donors and associates with interests before the State Department.
Tom Fitton, the president of Judicial Watch, charged that Mrs. Clinton “hid” the documents from the public because they...