nsx1.trimitra.net.id has no MX records.
Question and response
Question
dig nsx1.trimitra.net.id. MX
Answer
The response has no answer records.
Authority
trimitra.net.id. 3143 SOA ns1.trimitra.net.id. hostmaster.trimitra.net.id. 1 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0