Why Blocking Accounts Over Temp Emails Alone Creates More Risk Than It Solves

Fraud and support systems often flag accounts using temporary emails as abusive, but treating a single signal as definitive proof leads to poor outcomes. Legitimate users — including privacy-conscious individuals, testers, and automated integrations — can trigger the same flags as bad actors. Cloudflare's analysis of recent abuse campaigns highlights the need to correlate multiple signals rather than react to one in isolation. Ambiguous decisions made without full context overload support queues, confuse legitimate users, and leave on-call teams unable to reconstruct what happened. A more effective approach evaluates the attempted action, activity velocity, decision explainability, and the cost of falsely blocking a real user.