Donaldson R F Disposable Email Detector
Find throw-away addresses (Mailinator, Guerrilla Mail, 10-minute mail and thousands more) in a list, and separate them from the rest.
Most common disposable domains
How it works
Disposable (or throw-away) email services give out temporary addresses that people use to avoid giving their real one. This tool compares each address’s domain — and its parent domains, so mail.spammer.example is caught if spammer.example is listed — with the open-source disposable-email-domains blocklist (public domain, CC0). The built-in copy has 8,981 domains (snapshot taken on 25 September 2026); it is only loaded when you run this tool, and the check happens in your browser.
No list can be complete or current: new throw-away domains appear every day, and a few listed domains may also have real users. Treat the result as a strong hint, not proof. Related: role-based email detector and clean email list (which can remove disposable addresses for you).
Frequently asked questions
How big is the list and where is it from?
It has 8,981 domains, taken on 25 September 2026 from the open-source disposable-email-domains project (CC0 / public domain).
Is Gmail or Outlook on the list?
No. Ordinary free mailbox providers are not disposable services and are not listed.
Is my list uploaded?
No. The domain list is downloaded to your browser and the check runs there.