mail.pomocplay.pl has no CNAME records.
Question and response
Question
dig mail.pomocplay.pl. NS
Answer
The response has no answer records.
Authority
pomocplay.pl. 751 SOA ns1.project4.pl. dnsmaster.project4.pl. 2024050802 7200 3600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0