powersmtp.iagente.net.br has no MX records.
Question and response
Question
dig powersmtp.iagente.net.br. MX
Answer
The response has no answer records.
Authority
iagente.net.br. 3600 SOA ns1.iagente.net.br. hostmaster.iagente.net.br. 2023092201 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0