Apex domains cannot have CNAME records.
Question and response
Question
dig tatarmeteo.ru. NS
Answer
tatarmeteo.ru. 4 NS mail.tatarmeteo.ru.
tatarmeteo.ru. 4 NS mail2.tatarmeteo.ru.
Authority
The response has no authority records.
Additional
mail.tatarmeteo.ru. 4 A 217.118.176.202
mail2.tatarmeteo.ru. 4 A 91.244.253.170
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0