d.hkirc.net.hk has no MX records.
Question and response
Question
dig d.hkirc.net.hk. MX
Answer
The response has no answer records.
Authority
hkirc.net.hk. 3600 SOA ns7.hkirc.net.hk. administrator.hkirc.net.hk. 2024011777 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0