relay.spamshield.io has no NS records.
NS records for this zone are defined at spamshield.io.
NS records for this zone are defined at spamshield.io.
Question and response
Question
dig relay.spamshield.io. NS
Answer
The response has no answer records.
Authority
spamshield.io. 300 SOA ns1.io-servers.com. admin.io-servers.com. 2023080100 86400 7200 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0