smtp.westcall.net has no CNAME records.
Question and response
Question
dig smtp.westcall.net. NS
Answer
The response has no answer records.
Authority
westcall.net. 2659 SOA ns2.westcall.net. hostmaster.westcall.net. 2026022700 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0