Presumably that just means using their DNS.
And it would be good if that was what was stated, as opposed to brand names and buzzwords.
Yes, i realize you can’t necessarily know, but the truth is you’ll be hard pressed to find anyone that cares enough to find out for you. But if it is a general problem in what could be seen as basic functionality, you’ll have a much better chance of getting this picked up.
How is this relevant to Sailfish OS?