As of SMAX 2020.08 (and most probably in the November release too) SMAX accepts onlypublic available domains. This list is hard coded. Some customers (at least my 2 in Germany) are running SMAX in their intranet with internal domains (i.e. .mf and not .microfocus.com).
We need an option to add customer-internal domains to the list. I think this affectes only offline on-premise deployments.