spf.event-works.com has no CNAME records.
Question and response
Question
dig spf.event-works.com. NS
Answer
The response has no answer records.
Authority
event-works.com. 3229 SOA pdns13.domaincontrol.com. dns.jomax.net. 2026011400 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0