In roughly three-quarters of those cases, officials have determined that material Clinton herself wrote in the body of email messages is classified. Clinton sometimes initiated the conversations but more often replied to aides or other officials with brief reactions to ongoing discussions.
The analysis also showed that the practice of using non-secure email systems to send sensitive information was widespread at the department and elsewhere in government.
Clinton’s publicly released correspondence also includes classified emails written by about 300 other people inside and outside the government, the analysis by The Post found. The senders included longtime diplomats, top administration officials and foreigners who held no U.S. security clearance.
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In those cases, Clinton was typically not among the initial recipients of the classified emails, which were included in back-and-forth exchanges between lower-level diplomats and other officials and arrived in her inbox only after they were forwarded to her by a close aide.