myinfra.fr has no MX records.
Question and response
Question
dig myinfra.fr. MX
Answer
The response has no answer records.
Authority
myinfra.fr. 3600 SOA ns1.myinfra.fr. hostmaster.cegedim.com. 2015020428 1200 300 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0