smtp6.deodand.com.hk has no MX records.
Question and response
Question
dig smtp6.deodand.com.hk. MX
Answer
The response has no answer records.
Authority
deodand.com.hk. 3600 SOA ns1.afraid.org. dnsadmin.afraid.org. 2401140001 86400 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0