dns5.interedetelecom.com.br has no MX records.
Question and response
Question
dig dns5.interedetelecom.com.br. MX
Answer
The response has no answer records.
Authority
interedetelecom.com.br. 604800 SOA dns3.interedetelecom.com.br. root.interedetelecom.com.br. 5 604800 86400 2419200 604800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0