dns2.emailchile.cl has no CNAME records.
Question and response
Question
dig dns2.emailchile.cl. NS
Answer
The response has no answer records.
Authority
emailchile.cl. 2407 SOA dns1.emailchile.cl. root.servidor.emailchile.cl. 2026030903 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0