mail.phg.hr has no CNAME records.
Question and response
Question
dig mail.phg.hr. NS
Answer
The response has no answer records.
Authority
phg.hr. 3340 SOA ns1.phg.hr. server.plus.hr. 2025022400 86400 7200 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0