**1) click 2nd tab "Website & Domains"
2) then click "Add New Domain Alias"
3) Paste domain
4) Select corresponding domain ***.de / ***.com / ***.nl / ***.fr
5) Check checkboxes: Synchronize DNS zone with the primary domain & Web service (leave Mail service unchecked)
6) Click "OK"
Repeat step 2 - 6 for every alias domain.**