mail.ig-zp.pl has no MX records.
Question and response
Question
dig mail.ig-zp.pl. MX
Answer
The response has no answer records.
Authority
ig-zp.pl. 3600 SOA ns1.ig-zp.pl. biuro.ig-zp.pl. 2026030202 7200 540 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0