mailsortant.ozone.net has no CNAME records.
Question and response
Question
dig mailsortant.ozone.net. NS
Answer
The response has no answer records.
Authority
ozone.net. 3600 SOA ns.ozone.net. admin.ozone.net. 2026030401 7200 3600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0