updates.myvert.com has no CNAME records.
Question and response
Question
dig updates.myvert.com. NS
Answer
The response has no answer records.
Authority
myvert.com. 270 SOA ns.rackspace.com. info.mayfonk.com. 1700235787 21600 3600 1814400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0