gwh.cri.agh.edu.pl has no MX records.
Question and response
Question
dig gwh.cri.agh.edu.pl. MX
Answer
The response has no answer records.
Authority
cri.agh.edu.pl. 10800 SOA ns1.agh.edu.pl. hostmaster.uci.agh.edu.pl. 202602110 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0