mail.pch.ro has no CNAME records.
Question and response
Question
dig mail.pch.ro. NS
Answer
The response has no answer records.
Authority
pch.ro. 1136 SOA nsx.pch.ro. postmaster.pch.ro. 2025071816 7200 540 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0