pan.wroc.pl has no MX records.
Question and response
Question
dig pan.wroc.pl. MX
Answer
The response has no answer records.
Authority
pan.wroc.pl. 86400 SOA wask.wask.wroc.pl. admin.wask.wroc.pl. 2024060301 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0