smtp.demosmtp.gmessaging.net has no MX records.
Question and response
Question
dig smtp.demosmtp.gmessaging.net. MX
Answer
The response has no answer records.
Authority
demosmtp.gmessaging.net. 3600 SOA ns6.oleane.net. hostmaster.oleane.net. 2024060410 86400 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0