Two things get a domain filtered that DNS records will not tell you about: it is on a spam blacklist, or it does not serve a website at all. Filters treat a domain with no site as a throwaway, because usually it is.
The domain detail page now runs both checks:
- Blacklist check against the major DNS blocklists, listing which ones you appear on.
- Website check, confirming the domain resolves and serves an actual page.
Verification is rate-limited so repeated checks cannot get you throttled by the list operators, and results are cached with a visible timestamp so you know how fresh the answer is.