webmail134.oemdatacenters.net has no CNAME records.
Question and response
Question
dig webmail134.oemdatacenters.net. NS
Answer
The response has no answer records.
Authority
oemdatacenters.net. 2124 SOA pdns1.provisiondata.net. hostmaster.provisiondata.com. 2010032604 1800 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0