dns1.dataspace.pl has no MX records.
Question and response
Question
dig dns1.dataspace.pl. MX
Answer
The response has no answer records.
Authority
dataspace.pl. 3600 SOA dns1.dataspace.pl. dns.dataspace.pl. 1772595478 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0