mx.almatel.RU has no CNAME records.
Question and response
Question
dig mx.almatel.RU. NS
Answer
The response has no answer records.
Authority
almatel.RU. 600 SOA ns1.almatel.RU. noc.almatel.RU. 2025102923 7200 3600 3600000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0