mail.webhost1.ru has no CNAME records.
Question and response
Question
dig mail.webhost1.ru. NS
Answer
The response has no answer records.
Authority
WEBHOST1.RU. 1659 SOA ns1.webhost1.com. tech.webhost1.com. 2021121204 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0