zc-dns.net has no MX records.
Question and response
Question
dig zc-dns.net. MX
Answer
The response has no answer records.
Authority
zc-dns.net. 3600 SOA ns-a1.conoha.io. hostmaster.conoha.io. 2020101305 1800 900 604800 3600
Additional
. 0 OPT ; payload 2800, xrcode 0, version 0, flags 0