mta04.globetrotter.net has no MX records.
Question and response
Question
dig mta04.globetrotter.net. MX
Answer
The response has no answer records.
Authority
globetrotter.net. 600 SOA dns13.telus.com. dnsadmin2.telus.com. 2023051531 600 7200 3600000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0