us.global.ar has no MX records.
Question and response
Question
dig us.global.ar. MX
Answer
The response has no answer records.
Authority
global.ar. 86400 SOA dns1.globalgate.com.ar. postmaster.global.ar. 2021071716 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0