mailserver.cetelem-bgn.com.br has no MX records.
Question and response
Question
dig mailserver.cetelem-bgn.com.br. MX
Answer
The response has no answer records.
Authority
cetelem-bgn.com.br. 600 SOA ns1.bnpparibas.com. i_names.bnpparibas.com. 47 14400 3600 2419200 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0