myinfra.net has no MX records.
Question and response
Question
dig myinfra.net. MX
Answer
The response has no answer records.
Authority
myinfra.net. 3600 SOA ns1.myinfra.fr. hostmaster.cegedim.com. 2015021101 1200 300 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0