smarthost2.o4scloud.com has no MX records.
Question and response
Question
dig smarthost2.o4scloud.com. MX
Answer
The response has no answer records.
Authority
o4scloud.com. 900 SOA nsauth1.pinkzuid.nl. hostmaster.pinkzuid.nl. 2024030100 28800 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0