mx02.unicope.com has no CNAME records.
Question and response
Question
dig mx02.unicope.com. NS
Answer
The response has no answer records.
Authority
unicope.com. 1996 SOA ns1.unicope.net. webmaster.unicope.com. 2026021102 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0