stat.dkm.dp.ua has no MX records.
Question and response
Question
dig stat.dkm.dp.ua. MX
Answer
The response has no answer records.
Authority
dkm.dp.ua. 86400 SOA dkm.dp.ua. hostmaster.dkm.dp.ua. 2012020915 10800 900 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0