cloudmail01.clausweb.ro has no CNAME records.
Question and response
Question
dig cloudmail01.clausweb.ro. NS
Answer
The response has no answer records.
Authority
clausweb.ro. 2511 SOA ns.romania-webhosting.com. claus_ila.yahoo.com. 2026011900 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0