mx.pix-face.com has no CNAME records.
Question and response
Question
dig mx.pix-face.com. NS
Answer
The response has no answer records.
Authority
pix-face.com. 3400 SOA dns.pix-face.com. hostmaster.pix-face.com. 1434241690 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0