outlook.cvcauth.com has no MX records.
Question and response
Question
dig altbthpwexg03.srv.bthpny.alticeusa.com. MX
Answer
The response has no answer records.
Authority
bthpny.alticeusa.com. 900 SOA authns1.alticeusa.net. postmaster.alticeusa.com. 2019101602 7200 600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0