cdn.bsh.ru has no MX records.
Question and response
Question
dig d.edgecdn.ru. MX
Answer
The response has no answer records.
Authority
d.edgecdn.ru. 300 SOA ns1.edgedns.ru. support.edgecenter.ru. 1741196454 5400 3600 1209600 300
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0