smtp-101-229.inetmail.cloud has no MX records.
Question and response
Question
dig smtp-101-229.inetmail.cloud. MX
Answer
The response has no answer records.
Authority
inetmail.cloud. 300 SOA ns01.inet.co.th. root.inetmail.cloud. 843 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0