static.cpe.netcabo.pt has no MX records.
Question and response
Question
dig static.cpe.netcabo.pt. MX
Answer
The response has no answer records.
Authority
static.cpe.netcabo.pt. 3600 SOA ns1.zon.pt. dns-admin.zon.pt. 2019102901 43200 172800 2592000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0