No, they send it through the service. Nothing ever gets printed.
The different companies and government organisations do have to support it though.
There are a few different companies that deliver the same service, the biggest (and first?) one is apparently used by almost half of the country’s population. Pretty much every service supports all the governmental organisations. Company support varies more.
One of the smaller (not small) service provider is owned by the goverment. I am thinking of switching to that one but I haven’t bother yet.
Apparently at least one of the smaller providers supports scanning of all physical mail but I have never had that.