mail.sistemaspalaciosrevdns.com has no MX records.
Question and response
Question
dig mail.sistemaspalaciosrevdns.com. MX
Answer
The response has no answer records.
Authority
sistemaspalaciosrevdns.com. 300 SOA ns1.bluehost.com. root.box2159.bluehost.com. 2023090300 86400 7200 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0