mail.LACNIC.NET has no CNAME records.
Question and response
Question
dig mail.LACNIC.NET. NS
Answer
The response has no answer records.
Authority
LACNIC.NET. 600 SOA ns.LACNIC.NET. hostmaster.LACNIC.NET. 2026012809 7200 3600 648736 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0