kr.ua has no MX records.
Question and response
Question
dig kr.ua. MX
Answer
The response has no answer records.
Authority
kr.ua. 3600 SOA ns.host.kr.ua. hostmaster.host.kr.ua. 2024073680 3600 1200 1814400 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0