mail.meganet.com.pl has no MX records.
Question and response
Question
dig mail.meganet.com.pl. MX
Answer
The response has no answer records.
Authority
meganet.com.pl. 180 SOA ns1.meganet.com.pl. root.meganet.com.pl. 2025111305 7200 3600 1209600 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0