jb1.multacom.net has no MX records.
Question and response
Question
dig jb1.multacom.net. MX
Answer
The response has no answer records.
Authority
multacom.net. 86400 SOA ns1.multacom.com. support.multacom.com. 2024030100 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0