ns2.iq.pl has no MX records.
Question and response
Question
dig ns2.iq.pl. MX
Answer
The response has no answer records.
Authority
iq.pl. 3600 SOA ns1.iq.pl. dns.iq.pl. 2026030501 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0