ns0.DONPAC.RU has no MX records.
Question and response
Question
dig ns0.DONPAC.RU. MX
Answer
The response has no answer records.
Authority
DONPAC.RU. 3600 SOA ns0.DONPAC.RU. dnsmaster.DONPAC.RU. 2025090401 43200 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0