mail.poundllc.com has no CNAME records.
Question and response
Question
dig mail.poundllc.com. NS
Answer
The response has no answer records.
Authority
poundllc.com. 1739 SOA ns1.darl.com. ron.poundllc.com. 2025041601 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0