mail2.rdsar.ro has no CNAME records.
Question and response
Question
dig mail2.rdsar.ro. NS
Answer
The response has no answer records.
Authority
rdsar.ro. 10756 SOA ns.rdsnet.ro. dns-adm.rdsnet.ro. 2024052200 86400 3600 2419200 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0