mx2.Gawex.PL has no CNAME records.
Question and response
Question
dig mx2.Gawex.PL. NS
Answer
The response has no answer records.
Authority
gawex.pl. 2055 SOA DNS.gawex.pl. Admin.gawex.pl. 2025112103 28800 1200 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0