Restrict customers from granting access to panel for mailboxes
Give administrator permission to restrict ability to enable access to panel for newly created mailboxes and existing mailboxes for customer.
So the checkbox "Access to the Customer Panel" is not going to be visible under customer in Domains > example.com > Email Addresses > Create Email Address or for already created mailbox.
Thank you for your input! We will consider this functionality in upcoming releases if it will be popular.
Everyone, please continue voting for this feature if you consider it important.