ns4.seacomnet.com has no MX records.
Question and response
Question
dig ns4.seacomnet.com. MX
Answer
The response has no answer records.
Authority
seacomnet.com. 14400 SOA ns3.seacomnet.com. hostmaster.seacom.mu. 2025063091 10800 3600 2419200 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0