mail.tumundo.cl has no CNAME records.
Question and response
Question
dig mail.tumundo.cl. NS
Answer
The response has no answer records.
Authority
tumundo.cl. 3313 SOA ns1.tumundo.cl. infraestructurati.mundopacifico.cl. 2026021601 10800 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0