mail.NOTDESTINY.RU has no CNAME records.
Question and response
Question
dig mail.NOTDESTINY.RU. NS
Answer
The response has no answer records.
Authority
NOTDESTINY.RU. 697 SOA ns1.axelname.RU. info.axelname.RU. 1728091847 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0