mxout1.netia.pl has no MX records.
Question and response
Question
dig mxout1.netia.pl. MX
Answer
The response has no answer records.
Authority
netia.pl. 600 SOA ns1.internetia.pl. root.ns1.internetia.pl. 2026022100 86400 7200 2592000 345600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0