mx1.net35.ru has no CNAME records.
Question and response
Question
dig mx1.net35.ru. NS
Answer
The response has no answer records.
Authority
net35.ru. 3306 SOA net35.ru. root.net35.ru. 2025011403 3600 900 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0