mapfre.net has no MX records.
Question and response
Question
dig mapfre.net. MX
Answer
The response has no answer records.
Authority
mapfre.net. 3600 SOA esdns1.mapfre.net. dnsadmin.mapfre.com. 2026022301 3600 600 86400 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0