dns2.orbitelecom.com.br has no MX records.
Question and response
Question
dig dns2.orbitelecom.com.br. MX
Answer
The response has no answer records.
Authority
orbitelecom.com.br. 300 SOA dns1.orbitelecom.com.br. hostmaster.orbitelecom.com.br. 2026052224 7200 3600 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0