sms-hub.jtglobal.com has no MX records.
Question and response
Question
dig sms-hub.jtglobal.com. MX
Answer
The response has no answer records.
Authority
jtglobal.com. 60 SOA ns0.jtibs.net. ops.jtibs.net. 2026022400 7200 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0