mx1.NETANGELS.RU has no CNAME records.
Question and response
Question
dig mx1.NETANGELS.RU. NS
Answer
The response has no answer records.
Authority
NETANGELS.RU. 205 SOA ns1.NETANGELS.RU. hostmaster.NETANGELS.RU. 1771625540 3600 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0