eu9.coreonix.com has no MX records.
Question and response
Question
dig eu9.coreonix.com. MX
Answer
The response has no answer records.
Authority
coreonix.com. 3600 SOA ns1.domaindiscover.com. hostmaster.tierra.net. 2025121802 7200 1800 604800 28800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0