mx1.m.sprut.primorye.ru has no CNAME records.
Question and response
Question
dig mx1.m.sprut.primorye.ru. NS
Answer
The response has no answer records.
Authority
PRIMORYE.RU. 2365 SOA ns1.pk.RU. root.ip.rostelecom.RU. 2025110201 86400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0