I’m the guy that provided a Cpanel backup in a public thread earlier this week.
It turned out that the cpanel backup did migrate mail and users on your side.
I’m not sure a private made post n the forum is the best way, but I was not able to find an other way to create an support ticket.
Please let me know this is the right place.
For now, the user with mail I need is the user fvb that is the domain owner.