spf05.gabia.com has no MX records.
Question and response
Question
dig spf05.gabia.com. MX
Answer
The response has no answer records.
Authority
gabia.com. 1800 SOA ns.gabia.co.kr. hosting.gabia.com. 2023031322 1800 60 1209600 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0