Any chance of allowing more TLDs for the registration process? My TLD of choice for e-mail (.Industries) is considered illegitimate when attempting to register for Cloudflare.
Could it be I'm using an alias of Cloudflare@mydomain.industries?
Edit: Attempting "cf@domain.industries" and receiving the same error. Assuming you're accepting .industries registrations, it could very well be my corporate firewall blocking requests to something. I'll attempt again this evening from home.