indom80.indomco.hk has no MX records.
Question and response
Question
dig indom80.indomco.hk. MX
Answer
The response has no answer records.
Authority
indomco.hk. 7200 SOA udns1.cscdns.net. hostmaster.cscdns.net. 2017092112 86400 7200 3600000 7200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0