mx02.waridtel.com has no CNAME records.
Question and response
Question
dig mx02.waridtel.com. NS
Answer
The response has no answer records.
Authority
waridtel.com. 197 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