mx.enterra.dp.ua has no MX records.
Question and response
Question
dig mx.enterra.dp.ua. MX
Answer
The response has no answer records.
Authority
enterra.dp.ua. 3600 SOA ns.enterra.dp.ua. hostmaster.enterra.dp.ua. 2025012602 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0