mx2.milkywan.fr has no CNAME records.
Question and response
Question
dig mx2.milkywan.fr. NS
Answer
The response has no answer records.
Authority
milkywan.fr. 2489 SOA ns1.milkywan.fr. admsys.milkywan.fr. 2026030208 10800 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0