mail.lwsdns.com has no CNAME records.
Question and response
Question
dig mail.lwsdns.com. NS
Answer
The response has no answer records.
Authority
lwsdns.com. 300 SOA ns1.lwsdns.com. hostmaster.lwsdns.com. 1709026630 25200 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0