Or perhaps broken DNS. For example the server only listens for IPv6 and the DNS server incoreectly replies NXDOMAIN for AAAA records, as apoarently the Mullvad DoH servers do...
Perhaps easiest is to check using xmpp-dns and see what it says. :D
Or perhaps broken DNS. For example the server only listens for IPv6 and the DNS server incoreectly replies NXDOMAIN for AAAA records, as apoarently the Mullvad DoH servers do...
Perhaps easiest is to check using xmpp-dns and see what it says. :D