initial I have added a domain in ciphermail Domains. Some time later I am not able to delete this domain. There is no red cross and no posibillity to check the box. Mouse pointer becomes prohibition sign.
A domain cannot be deleted if the domain is in use. The technical reason for this is that a user object has a reference to a domain object and the database refuses to delete the domain.
You can only delete the domain if there are no users from the domain.
Instead of deleting the domain, you can make sure all settings of the domain are inherited because if all domain settings are inherited, there is no difference between having the domain or not.