Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain vd8bd40dp08mufijdv0i5f3qmdfrq9s2.nempost.dk is not the root of its zone.
Instead, try zone transfer on nempost.dk .
Instead, try zone transfer on nempost.dk .