Your provider is using this to estimate if a party is spam and block your email. I prefer a system where you actually block someone for having send spam. Since I am not sending newsletters or so and this infrastructure I use is low volume, nothing outgoing is detected as spam.
psssst I am the provider, what I say goes :)
the tests detect poorly set up DNS which can lead to deliverability issues. It's my choice to include that test on some servers, its also
But now you are like ms/google/letsencrypt. We decide how you should setup your servers, we decide how you setup your dns, we decide you are not allowed to block the amazon cloud etc.
not the final judge, there are other tests, and your providers rep is tipping you over, only just though.
No way to little volume. You should focus on that this system is not updating its data, maybe because it is on a shared network that is being blocked because of unnecessary scraping?