postfixadmin.asiandomainhosting.com has no CNAME records.
Question and response
Question
dig postfixadmin.asiandomainhosting.com. NS
Answer
The response has no answer records.
Authority
asiandomainhosting.com. 3202 SOA ns1.asiandomainhosting.com. root.asiandomainhosting.com. 2023040302 1200 120 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0