How do i create two public email adrresses with same recipients but different domains?

given your citadel may recieve mail for two domains:

and now you want sales@ to be delivered into different rooms you could do this the following way:

from now on these two email adresses will become delivered to different rooms. You could imagine the same scenario for two users, like

is here. Now Junior should receive, and Senior This will be just possible if there is no einstein user! Now Junior will have to add to his personal v-card, Senior adds to his. Both will now receive the mail accounts they like.