vid.kurs.dn.ua has no MX records.
Question and response
Question
dig vid.kurs.dn.ua. MX
Answer
The response has no answer records.
Authority
kurs.dn.ua. 60 SOA ns14.inhostedns.com. hostmaster.adm.tools. 2026021700 43200 7200 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0