spfa-mailer.incnets.com has no CNAME records.
Question and response
Question
dig spfa-mailer.incnets.com. NS
Answer
The response has no answer records.
Authority
incnets.com. 3600 SOA ns1.hkbn.net. sysadm.ns1.hkbn.net. 2025041801 3600 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0