Apparently at least one opinion writer at the Washington Post had a similar reaction.
The Washington Post reports this evening that Ivanka Trump made extensive use of her personal email account for official business (emphasis mine):
Ivanka Trump sent hundreds of emails last year to White House aides, Cabinet officials and her assistants using a personal account, many of them in violation of federal records rules, according to people familiar with a White House examination of her correspondence.
White House ethics officials learned of Trump’s repeated use of personal email when reviewing emails gathered last fall by five Cabinet agencies to respond to a public records lawsuit. That review revealed that throughout much of 2017, she often discussed or relayed official White House business using a private email account with a domain that she shares with her husband, Jared Kushner.
Both Trump and Clinton relied on their personal attorneys to review their private emails and determine which messages should be retained as government records.
Ivanka Trump and her husband set up personal emails with the domain “ijkfamily.com” through a Microsoft system in December 2016, as they were preparing to move to Washington so Kushner could join the White House, according to people familiar with the arrangement.
The couple’s emails are prescreened by the Trump Organization for security problems such as viruses but are stored by Microsoft, the people said.
In April 2017, she used her personal email to write to Treasury Secretary Steven Mnuchin’s chief of staff, Eli Miller, suggesting that he connect with her chief of staff, Julie Radford. The email chain, obtained by American Oversight, was copied to Radford’s government account.
“It would be great if you both could connect next week to discuss [redacted],” she wrote. “We would love your feedback and input as we structure.”
I emphasized the reference to her use of a Microsoft-hosted email server to illustrate just how irresponsibly careless this was. Many security professionals would characterize this choice as even more dubious than Ms. Clinton’s decision to host her own. There is no way to know how many Microsoft employees, contractors, and other third-party providers have had access to the email traffic of Ms. Trump and Mr. Kushner.
After all the campaign nonsense, and all the hysterical attacks from Trumpist legislators about Ms. Clinton (including the firing of Mr. Comey), there’s only one thing to say …
“Lock her up!”