mail.tld.ee has no CNAME records.
Question and response
Question
dig mail.tld.ee. NS
Answer
The response has no answer records.
Authority
tld.ee. 3051 SOA c.tld.ee. hostmaster.tld.ee. 2026022412 10800 3600 604800 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0