mx1.cetelem.pt has no MX records.
Question and response
Question
dig mx1.cetelem.pt. MX
Answer
The response has no answer records.
Authority
cetelem.pt. 600 SOA ns1.bnpparibas.com. i_names.bnpparibas.com. 117 14400 3600 2419200 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0