z-ms4.wcss.wroc.pl has no MX records.
Question and response
Question
dig z-ms4.wcss.wroc.pl. MX
Answer
The response has no answer records.
Authority
wcss.wroc.pl. 86400 SOA wask.wask.wroc.pl. admin.wask.wroc.pl. 2026012202 86400 7200 1209600 172800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0