master.man.bialystok.pl has no MX records.
Question and response
Question
dig master.man.bialystok.pl. MX
Answer
The response has no answer records.
Authority
man.bialystok.pl. 3600 SOA dns.man.bialystok.pl. admin.biaman.pl. 2026012002 10800 1200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0