smtpscan-nl4.asp.nl.ext.origin-asp.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 smtpscan-nl4.asp.nl.ext.origin-asp.com is not the root of its zone.
Instead, try zone transfer on nl.ext.origin-asp.com .