mns.gabia.net has no MX records.
Question and response
Question
dig mns.gabia.net. MX
Answer
The response has no answer records.
Authority
mns.gabia.net. 86400 SOA ns.gabia.co.kr. hosting.gabia.com. 2023011513 1800 600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0