smtp7.deodand.com.hk has no MX records.
Question and response
Question
dig smtp7.deodand.com.hk. MX
Answer
The response has no answer records.
Authority
deodand.com.hk. 900 SOA ns1.hkbnes.net.hk. hostmaster.hkbnes.net.hk. 12 1200 120 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0