Disposable Email Checker — Instantly Detect Temp and Burner Addresses

A disposable email address is a temporary mailbox that anyone can create without registering, usually to receive a verification code, bypass a signup wall, or avoid sharing a personal address. Providers like Mailinator, Yopmail, Guerrilla Mail, and Temp.now itself give out addresses that self-destruct after a short window or that anyone can open by guessing the inbox name.

Disposable addresses make spam, fraud, and trial abuse cheap. A single user can sign up hundreds of times to claim free trials, manipulate referral programs, or post low-quality content with no accountability. Blocking known disposable domains at signup is the simplest first line of defense, usually combined with rate limiting and verified billing.

Unknown means the domain is not in the local list and does not match the suspicious naming patterns we check for. It does not guarantee the mailbox is permanent or trustworthy. New disposable providers appear constantly and many run on custom domains that no public list will catch immediately.

Use it for manual review, list cleanup, and prototyping. Automated blocking should rely on a server-side API that updates its disposable-domain list continuously, plus logging, an allowlist, and a false-positive review path. The checker above is intentionally conservative because local lists go stale.