Updating this thread because a number of CloudFlare users are on this and I want to make them aware of a CloudFlare phishing threat. If you receive an email like this, please contact us at email@example.com.
(do not reply or click on any links if you receive the email).
Dear cloudflare.com client, costumer (has user Domain.com in it)
Domain account (domain.com) has exceeded the limit load available for the existing pay rate plan.
Methods of load analysis and elimination :
(URL removed for obvious reasons)
In order to prevent your account from being locked out we recommend that you change the existing rate plan onto a more powerful one or limit the server load by means of code optimization.