mailtest.ezydomain.com has no CNAME records.
Question and response
Question
dig mailtest.ezydomain.com. NS
Answer
The response has no answer records.
Authority
ezydomain.com. 184 SOA ns6.ezydomain.com. technical.webnic.cc. 2025091700 10000 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0