Reloop Temp Email Checker

Reloop's Temp Email Checker is a free tool that flags disposable and role-based signup addresses before they hurt a sender's deliverability: paste an email and it checks RFC syntax, matches against roughly 210k known disposable domains, flags generic role prefixes like admin@ or info@, and confirms the domain has a working mail server, all without signup, an API key, or SMTP probing. A free public API is available to drop the same check into a registration flow.