ns4.hostname.cl has no MX records.
Question and response
Question
dig ns4.hostname.cl. MX
Answer
The response has no answer records.
Authority
hostname.cl. 86400 SOA ns1.hostname.cl. hardy.shia.cl. 2026022207 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0