mail.tatarmeteo.ru has no CNAME records.
Question and response
Question
dig mail.tatarmeteo.ru. NS
Answer
The response has no answer records.
Authority
tatarmeteo.ru. 108 SOA mail.tatarmeteo.ru. aspd.tatarmeteo.ru. 2025100301 3600 3600 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0