mx.place-start.ru has no CNAME records.
Question and response
Question
dig mx.place-start.ru. NS
Answer
The response has no answer records.
Authority
place-start.ru. 60 SOA ns1.place-start.ru. fnr.place-start.ru. 2026020602 300 120 2419200 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0