On 09/12/2021 18.16, Mats Dufberg wrote:

If you query for something that matches that wildcard, e.g. "x.lindforslaw.se A", then AD is not set, but it is not SERVFAIL.

The wildcard proof involves an opt-out NSEC3 record in this case.  That means a delegation might exist instead of the wildcard expansion, but that can't be (dis)proven.

--Vladimir | knot-resolver.cz
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