nsmaster.allinmedia.com.br has no MX records.
Question and response
Question
dig nsmaster.allinmedia.com.br. MX
Answer
The response has no answer records.
Authority
allinmedia.com.br. 86400 SOA nsmaster.allinmedia.com.br. root.server.allinmedia.com.br. 2022051101 3600 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0