mx01.waridtel.com has no CNAME records.
Question and response
Question
dig mx01.waridtel.com. NS
Answer
The response has no answer records.
Authority
waridtel.com. 199 SOA ns.cyber.net.pk. neteng.cyber.net.pk. 2020030301 10800 3600 1728000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0