_spf.notifier.web.plus has no CNAME records.
Question and response
Question
dig _spf.notifier.web.plus. NS
Answer
The response has no answer records.
Authority
web.plus. 3535 SOA premium1.ezydomain.com. technical.webnic.cc. 202505470 10000 2400 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0