mx.lamyliaisons.fr has no CNAME records.
Question and response
Question
dig mx.lamyliaisons.fr. NS
Answer
The response has no answer records.
Authority
lamyliaisons.fr. 10800 SOA dns1.cscdns.net. hostmaster.cscdns.net. 2022100545 28800 7200 604800 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0