ams.resource.cloud has no MX records.
Question and response
Question
dig ams.resource.cloud. MX
Answer
The response has no answer records.
Authority
ams.resource.cloud. 3580 SOA ns2.ams.teamblue.cloud. hostmaster.teamblue.cloud. 1771922369 3582 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0