mx.starpoint.net has no CNAME records.
Question and response
Question
dig mx.starpoint.net. NS
Answer
The response has no answer records.
Authority
starpoint.net. 237 SOA dns.starpoint.net. hostmaster.starpoint.net. 2025111125 300 300 300 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0