dns01.cloud.kbrwadventure.com has no MX records.
Question and response
Question
dig dns01.cloud.kbrwadventure.com. MX
Answer
The response has no answer records.
Authority
kbrwadventure.com. 600 SOA dns01.kbrwadventure.com. dnsmaster.kbrwadventure.com. 2026022305 7200 1800 1209600 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0