All, let's keep things positive and informative. Life is too damn difficult these days!
Thomas, this question comes up occasionally and it's usually about licensing.
The domain role is essential for managing Permissions, Privileges and Scope throughout SmarterMail and the same applies to the System Admin role. This is the core of our product and has been for 20 years and it's how hundreds of products integrate with SmarterMail. Typically, domain admins are employees and use the same account as their email address. Often, there are multiple domain admins in larger organizations.
We strive to build powerful products that are affordable and compete with much more expensive products but we realize that sometimes our products don't suit all customers. We want customers to be successful and sometimes our products are not the solution. I hope this information helps you understand things a little better and help you decide if our product is the right solution for you.