www.se.vkube.cloud has no MX records.
Question and response
Question
dig www.se.vkube.cloud. MX
Answer
The response has no answer records.
Authority
se.vkube.cloud. 900 SOA ns-1317.awsdns-36.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0