Right - but that puts the 'solution' to this problem on your end, and not on the plate of the organisation sending it to you in the first place. Sure, this is the easiest way of dealing with it, but it's not how it should be. If Cloudflare needs more customers, they need to follow the marketing rules, and one of them is to allow users who are not interested in their offer to no longer receive these. The whole "verify your e-mail address" is bad enough and as stated above is nothing more than a barrier to prevent you from unsubscribing...