em101-smtp1.itc.cdc.telia.net 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 em101-smtp1.itc.cdc.telia.net is not the root of its zone.
Instead, try zone transfer on itc.cdc.telia.net .