webmail.guam.net has no CNAME records.
Question and response
Question
dig webmail.guam.net. NS
Answer
The response has no answer records.
Authority
guam.net. 60 SOA NS.guam.net. HostMaster.ns.guam.net. 2025122300 3600 3600 3600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0