zmta10.altia.es has no MX records.
Question and response
Question
dig zmta10.altia.es. MX
Answer
The response has no answer records.
Authority
altia.es. 86400 SOA ns1.altia.es. hostmaster.altia.es. 2026030300 86400 7200 2592000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0