Possibly related:
New State Department Documents Detail Nearly a Dozen Hack Attempts of Clinton’s Private Server
Nov 1, 2016
Excerpt:
Newly released State Department documents obtained by government watchdog Judicial Watch show hackers attempting to breach former Secretary of State Hillary Clinton’s private server, where she hosted top secret information, nearly a dozen times in just two days.
The hacking attempts are detailed by Clinton aide Bryan Pagliano, who set up the server, and Justin Cooper, a longtime aide to Bill Clinton and the Clinton Foundation. The attempts occurred between November 27 and 29 of 2010.
Could be, but this time Huma possibly hacked herself by forwarding her own mail by mistake or activating a backup feature.
The above article shows how the emails could have been copyed. It also suggests that there could be a lot of material.
"...Without that machine (Weiner's laptop) being under remote administration such as Domain Policy control (which we can reasonably assume it was not as Huma claims "she didn't know about it" and it was allegedly a private laptop) there is no remote capability to wipe or otherwise get into said computer and remove the emails either. In fact there's a decent chance it's running an operating system edition (if Windows) that lacks domain control capability entirely.
This means that the odds are extremely high that all of the deleted emails to which Huma was a participant are on that computer.
Every Single One....."