_spf1.contisystems.pt has no MX records.
Question and response
Question
dig _spf1.contisystems.pt. MX
Answer
The response has no answer records.
Authority
contisystems.pt. 300 SOA dns18.ovh.net. tech.ovh.net. 2026021300 86400 3600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0