desarrollos.orbea.com has no MX records.
Question and response
Question
dig desarrollos.orbea.com. MX
Answer
The response has no answer records.
Authority
orbea.com. 1800 SOA oswald.ns.cloudflare.com. dns.cloudflare.com. 2396704276 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0