kxe.io has no MX records.
Question and response
Question
dig kxe.io. MX
Answer
The response has no answer records.
Authority
kxe.io. 86400 SOA ns1.he.net. hostmaster.he.net. 2026012300 10800 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0