smtp.email.us-dcc-phoenix-2.ocs.oraclecloud17.com 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 smtp.email.us-dcc-phoenix-2.ocs.oraclecloud17.com is not the root of its zone.
Instead, try zone transfer on us-dcc-phoenix-2.ocs.oraclecloud17.com .