smtp.basefarm.com has no CNAME records.
Question and response
Question
dig smtp.basefarm.com. NS
Answer
The response has no answer records.
Authority
basefarm.com. 300 SOA ns01.osl.basefarm.net. hostmaster.basefarm.net. 2023074815 86400 3600 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0