mail.smsendi.pl has no NS records.
NS records for this zone are defined at smsendi.pl.
NS records for this zone are defined at smsendi.pl.
Question and response
Question
dig mail.smsendi.pl. NS
Answer
The response has no answer records.
Authority
smsendi.pl. 1800 SOA lynn.ns.cloudflare.com. dns.cloudflare.com. 2395773673 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0