smtp.artelecom.pt has no NS records.
NS records for this zone are defined at artelecom.pt.
NS records for this zone are defined at artelecom.pt.
Question and response
Question
dig smtp.artelecom.pt. NS
Answer
The response has no answer records.
Authority
artelecom.pt. 86400 SOA dnsh01.artelecom.pt. suporte.artelecom.pt. 2026030900 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0