This story has been updated.
The approximately 7,000 pages of Hillary Clinton emails released late Monday included messages ranging from U.S. efforts to stop Wikileaks disclosures to a Clinton request for help learning to use her new "hPad."
But it is what was not in the Clinton email dump that may be most important.
Approximately 150 of the emails released have information redacted because it has now been deemed to require classification, the State Department said Monday.
The information was not identified as classified when Clinton sent or received the emails.
State Department Deputy Spokesman Mark Toner said this most recent release will meet a federal court requirement that 25 percent of Clinton's emails from her private server be released by the end of August.
Some of the most noteworthy exchanges include:
A 2010 letter from State Department legal adviser Harold Koh to Julian Assange's lawyer warning that the release of classified information would endanger "the lives of countless individuals."
A 2010 note from Clinton asking colleague Philippe Reines if he can help her learn to use her new iPad, or "hPad," as Reines dubbed it. The Washington Post reported in March that Clinton used an iPad for emails, as well as a mobile phone. The report raises questions about Clinton's defense that she used a private email server so that she could carry just one device.
An email from top aide Huma Abedin indicating that State Department IT seemed to be unaware Clinton had a personal email address. "They had no idea it was YOU, just some random address so they emailed," Abedin wrote after Clinton received a test email asking if her account was receiving new messages.
Clinton praising now Democratic presidential rival Martin O'Malley back in 2010, writing to Maryland Sen. Barbara Mikulski: "How's our friend, Martin, doing? I know he has a rematch when he should be reelected by acclamation for steering the ship of state so well. Pls give him my best wishes."
In one of the odder exchanges of the document dump, a State Department staffer is tasked with tackling the problems of Gefilte fish transportation.
And in a January 2010 note, Clinton asks an aide, "Can you give me times for two TV shows: Parks and Recreation and The Good Wife?"
A State Department official also confirms that the approximately 150 emails that are being upgraded and subsequently classified are all at the "confidential" level — the lowest level of classification.
Newly classified emails include correspondence Clinton had with an aide about an Iran speech she delivered at American University in 2010, and another from the minister counselor for public affairs in Pakistan with the subject "Facebook Freed in Pakistan."
None are "Top Secret" as were two of the emails released last month.
In order for the emails to be released, the team from the intelligence agencies, FBI and State must agree on what should be redacted for reasons of privacy or national security and whether the emails should be classified.
In general, the Inspector General from the intelligence agencies has been demanding more classification than the State Department. Earlier this month, the State Department appealed the Inspector General's decisions to Director of National Intelligence General James Clapper.
The FBI has a team studying the emails to determine whether they were handled securely as is required by law. At this stage, it is not a criminal investigation.
But opponents of the Democratic presidential frontrunner have been quick to point to the redactions as proof Clinton sent and received sensitive information on her email server.
"Hillary Clinton's reckless attempt to skirt transparency laws put sensitive information and our national security at risk," Republican National Committee chair Reince Priebus said in a statement.
Carrie Dann contributed to this report.