Catch throwaway emails before they cost you.
2.6M+ disposable domains. Block fake signups, fake leads, fraud — at submit time.
- Flags disposable, temporary, and throwaway email domains in bulk before they pollute your list.
- Matches a 2.6M+ domain block-list (Mailinator, Guerrilla Mail, Temp-Mail and more), refreshed daily.
- Optional MX-record check confirms the domain can actually receive mail.
- Returns a labeled CSV — keep real signups, drop throwaways.
Last updated: June 2026
Every email, four checks deep.
Largest open list
Aggregated from 6 community sources, deduped, refreshed daily. Includes throwaway, redirect-to-real, and forwarder providers.
Block at signup
Hit our endpoint inline on your signup form. <30ms response. JSON in, JSON out.
Catch the new ones
Loose mode: pattern-match domains that quack like disposables before our nightly refresh adds them.
Clean old lists
Drop your historic signups in. Get a verdict column back. Quarantine the bad ones in your CRM.
Disposable Email Checker questions.
Won't I block real users on rare hostnames?
Strict mode is exact match against the 2.6M list — false positives are near-zero. Loose mode flags borderline cases for review, not auto-blocks.
How do you keep the list fresh?
Nightly merge of 6 sources: disposable-email-domains, ivolo, jamesh-7, and others. We submit our own newly-spotted ones upstream.