mail.s1.zenbox.pl has no NS records.
NS records for this zone are defined at s1.zenbox.pl.
NS records for this zone are defined at s1.zenbox.pl.
Question and response
Question
dig mail.s1.zenbox.pl. NS
Answer
The response has no answer records.
Authority
s1.zenbox.pl. 600 SOA ns1.zenbox.pl. hostmaster.s1.zenbox.pl. 2025062900 600 3600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0