postal._domainkey.rp.postal.arcatest.ch.arcatest.ch IXFR zone transfer

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 postal._domainkey.rp.postal.arcatest.ch.arcatest.ch is not the root of its zone.
Instead, try zone transfer on arcatest.ch .