mail.edu.ee has no CNAME records.
Question and response
Question
dig mail.edu.ee. NS
Answer
The response has no answer records.
Authority
edu.ee. 4394 SOA ns2.eenet.ee. hostmaster.eenet.ee. 2026022003 86400 7200 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0