I encountered two problems when just trying to look behind the tabs of E-Mail -> Email box -> Add as well as Sites -> Add Domain.
To see the other tabs I had to fill the mandatory fields, e.g. domain name. After clicking to the next tab, then leaving this mask to any other, and going back to e.g. domain overview or mailbox overview, the domains was already added, so its just the same as clicking the add button.
Then I got a question regarding the domainmanagement. In the design right now, it looks like "web" Domains and E-Mail Domains are comletely split. Will there be central Management, such like a "Domainpool" that can be used, depending on which group / user such pool is assigned to, so that the user has a central list of all his domains no matter if he is creating a mailbox or a website?