dns2.mchost.com has no MX records.
Question and response
Question
dig dns2.mchost.com. MX
Answer
The response has no answer records.
Authority
mchost.com. 3600 SOA dns1.mchost.ru. info.mchost.ru. 2021071301 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0