mx.unifique.net has no MX records.
Question and response
Question
dig mx.unifique.net. MX
Answer
The response has no answer records.
Authority
unifique.net. 3600 SOA dns1.tpa.com.br. postmaster.tpa.com.br. 2023110800 7200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0