authns1.alticeusa.net has no MX records.
Question and response
Question
dig authns1.alticeusa.net. MX
Answer
The response has no answer records.
Authority
alticeusa.net. 900 SOA authns1.cv.net. postmaster.alticeusa.net. 2016411313 7200 600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0