dom504.dominiando.net has no MX records.
Question and response
Question
dig dom504.dominiando.net. MX
Answer
The response has no answer records.
Authority
dominiando.net. 900 SOA ns1.register.it. hostmaster.register.it. 2025041010 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0