centurylink.com.br has no MX records.
Question and response
Question
dig centurylink.com.br. MX
Answer
The response has no answer records.
Authority
centurylink.com.br. 300 SOA authns1.qwest.net. abuse.aup.lumen.com. 2250924000 10800 3600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0