desconocido.furanet.com has no MX records.
Question and response
Question
dig desconocido.furanet.com. MX
Answer
The response has no answer records.
Authority
furanet.com. 3600 SOA dns1.hispalisdns.com. admin.furanet.com. 2026030301 3200 1600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0