mx.starka.st has no CNAME records.
Question and response
Question
dig mx.starka.st. NS
Answer
The response has no answer records.
Authority
starka.st. 3472 SOA dns-anycast.no-ack.net. soarnameadministratorregistryhostmasterdnsadmincontact.starka.st. 2026021133 14400 3600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0