proxy.vip.orbgny.alticeusa.net has no MX records.
Question and response
Question
dig proxy.vip.orbgny.alticeusa.net. MX
Answer
The response has no answer records.
Authority
orbgny.alticeusa.net. 900 SOA authns1.cv.net. postmaster.alticeusa.net. 2018082810 7200 600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0