smtp.be.sentia.cloud has no MX records.
Question and response
Question
dig smtp.be.sentia.cloud. MX
Answer
The response has no answer records.
Authority
be.sentia.cloud. 300 SOA ns1.cie.ac. hostmaster.cie.ac. 2026022513 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0