ns2.vzwdomain.com has no MX records.
Question and response
Question
dig ns2.vzwdomain.com. MX
Answer
The response has no answer records.
Authority
vzwdomain.com. 7200 SOA njbbintddns21v.local. vzw\.net\.dns.verizonwireless.com. 2010100647 43200 7200 1209600 7200
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0