nalpha.nasze.pl has no MX records.
Question and response
Question
dig nalpha.nasze.pl. MX
Answer
The response has no answer records.
Authority
nasze.pl. 86400 SOA alpha.nasze.pl. root.alpha.nasze.pl. 2025052101 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0