cityhost.com.ua has no MX records.
Question and response
Question
dig cityhost.com.ua. MX
Answer
The response has no answer records.
Authority
cityhost.com.ua. 3600 SOA ns1.controlpanel.host. support.cityhost.com.ua. 1139 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0