ns3.cimb.com has no MX records.
Question and response
Question
dig ns3.cimb.com. MX
Answer
The response has no answer records.
Authority
cimb.com. 300 SOA bhqkpk400206.cimbmy.cimbdomain.com. postmaster.cimb.com. 1472 10800 3600 2592000 300
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0