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 mx.kes.ESC-RUSHYDRO.ru is not the root of its zone.
Instead, try zone transfer on ESC-RUSHYDRO.ru .
Instead, try zone transfer on ESC-RUSHYDRO.ru .