mx.vieepuree.com has no CNAME records.
Question and response
Question
dig mx.vieepuree.com. NS
Answer
The response has no answer records.
Authority
vieepuree.com. 2843 SOA dns.vieepuree.com. hostmaster.vieepuree.com. 1440836453 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0