cdn-front-1.msk.cdn.GbLNET.ru has no MX records.
Question and response
Question
dig cdn-front-1.msk.cdn.GbLNET.ru. MX
Answer
The response has no answer records.
Authority
cdn.GbLNET.ru. 86400 SOA localhost. root.localhost. 2026020601 604800 86400 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0