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 60f81022f5ebb9cb8b49340989d5692d.smtp.dk is not the root of its zone.
Instead, try zone transfer on ax-msedge.net .
Instead, try zone transfer on ax-msedge.net .