mail.MYSAFECITY.RU has no CNAME records.
Question and response
Question
dig mail.MYSAFECITY.RU. NS
Answer
The response has no answer records.
Authority
MYSAFECITY.RU. 10467 SOA ns1.podolsknet.RU. info.podolsknet.RU. 2025051201 28800 7200 1728000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0