spfus.doxim.com has no CNAME records.
Question and response
Question
dig spfus.doxim.com. NS
Answer
The response has no answer records.
Authority
doxim.com. 1019 SOA ivan.ns.cloudflare.com. dns.cloudflare.com. 2398202014 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0