ats.24HC.RU has no MX records.
Question and response
Question
dig ats.24HC.RU. MX
Answer
The response has no answer records.
Authority
ats.24HC.RU. 3600 SOA ns.24HC.RU. hosting.24HC.RU. 2017060842 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0