vmemail.westelcom.com has no CNAME records.
Question and response
Question
dig vmemail.westelcom.com. NS
Answer
The response has no answer records.
Authority
westelcom.com. 10800 SOA ns.westelcom.com. noc.westelcom.net. 2026021201 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0