gw-smtp.dspace.pl has no NS records.
NS records for this zone are defined at dspace.pl.
NS records for this zone are defined at dspace.pl.
Question and response
Question
dig gw-smtp.dspace.pl. NS
Answer
The response has no answer records.
Authority
dspace.pl. 3600 SOA dns1.dataspace.pl. dns.dataspace.pl. 1773486013 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0