ns2.netvisao.pt has no MX records.
Question and response
Question
dig ns2.netvisao.pt. MX
Answer
The response has no answer records.
Authority
netvisao.pt. 86400 SOA ns.netvisao.pt. root.netvisao.pt. 2018041604 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0