cdn.webflow.com has no MX records.
Question and response
Question
dig cdn.webflow.com. MX
Answer
The response has no answer records.
Authority
cdn.webflow.com. 1800 SOA journey.ns.cloudflare.com. dns.cloudflare.com. 2396793165 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0