ns.conexaointernet.com.br has no MX records.
Question and response
Question
dig ns.conexaointernet.com.br. MX
Answer
The response has no answer records.
Authority
conexaointernet.com.br. 300 SOA ns.conexaointernet.com.br. andre.conexaointernet.com.br. 2024120102 14400 3600 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0