e.dioporc.one has no MX records.
Question and response
Question
dig e.dioporc.one. MX
Answer
The response has no answer records.
Authority
dioporc.one. 1800 SOA adi.ns.cloudflare.com. dns.cloudflare.com. 2396667992 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0