hera.hosting.minorisa.net has no MX records.
Question and response
Question
dig hera.hosting.minorisa.net. MX
Answer
The response has no answer records.
Authority
minorisa.net. 60 SOA ns1.minorisa.es. sistemes.minorisa.net. 2018010902 7200 3600 1209600 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0