mail.hosted-by-robovps.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 mail.hosted-by-robovps.com. is not the root of its zone.
Instead, try zone transfer on hosted-by-robovps.com .