dns.interkonekt.pl has no MX records.
Question and response
Question
dig dns.interkonekt.pl. MX
Answer
The response has no answer records.
Authority
interkonekt.pl. 3600 SOA dns.interkonekt.pl. dns2.interkonekt.pl. 2025011601 1200 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0