mx2.seacom.mu has no CNAME records.
Question and response
Question
dig mx2.seacom.mu. NS
Answer
The response has no answer records.
Authority
seacom.mu. 84 SOA ns3.seacomnet.com. hostmaster.seacom.mu. 2025101553 10800 3600 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0