smtp2.esp.vodafone.pt has no MX records.
Question and response
Question
dig smtp2.esp.vodafone.pt. MX
Answer
The response has no answer records.
Authority
vodafone.pt. 300 SOA ns-a1.vodafone.pt. dnsadmin.corp.vodafone.pt. 2026022600 10800 3600 1209600 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0