Hi my goal is to use the list of all domains web: client -> domains api: domains_domain_get (1) and to add corresponding mail domains api: mail_domain_add (2) (1) gives me the sys_groupid of the domain, but for adding the mail domain i need in (2) the client_id. i suppose the mapping is available in the mysql table sys_user. is this mapping somewhere in an API function? or how do i accomplish that? i thought that the sys_groupid is only for "internal reference" and the "client_id" is the id that should be used for all references? so why doesn't (1) return the client_id? thanks KoS