unallocated.sta.lan.ua has no MX records.
Question and response
Question
dig unallocated.sta.lan.ua. MX
Answer
The response has no answer records.
Authority
lan.ua. 900 SOA nsa1.srv53.net. support.dnshosting.org. 1771403152 1800 600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0