Free Disposable Email Checker
This free disposable email checker tests any address against 168,182 known disposable domains in under 5 ms — no signup, no credit card. The blocklist aggregates 7 open-source sources and refreshes daily from live temp-mail providers. Last updated 2026-09-01.
How the check works
- 1. Domain extraction. The domain is isolated from the address, then matched against the exact domain, any parent domain (catches
user@test.mailinator.com), and the community-reported list. - 2. Daily-harvested layer. Domains missed by the static snapshot are checked against the live-harvested set of rotating temp-mail providers, updated every day.
- 3. MX fallback. Unknown domains get an MX-record lookup — a domain that cannot receive mail is flagged separately, and brand-new temp-mail providers are caught this way.
Frequently asked questions
How do I check if an email is disposable?+
Paste the address into the checker above for an instant verdict. For automated checks, call the API: GET /api/v1/check?email=address@example.com with your Bearer key returns is_disposable true or false in one request.
Is this disposable email checker free?+
Yes. This web checker is free with no signup. The API has a free plan with 500 checks per month and no credit card. Paid plans start at $9/month for 50,000 checks.
What is a disposable email address?+
A disposable email address is a temporary inbox from providers like Mailinator, 10MinuteMail, or Guerrilla Mail that self-destructs after minutes or hours. People use disposable addresses to sign up for services without revealing a real inbox.
Can Gmail addresses be disposable?+
Gmail itself is not disposable, but gmail.com supports throwaway patterns: plus-addressing (name+tag@gmail.com) and the dot-trick (na.me@gmail.com) create unlimited aliases that all reach one inbox. DisposableGuard deliberately never blocks gmail.com — alias abuse needs different controls.
How many disposable email domains do you track?+
168,182 domains as of September 2026, aggregated from 7 open-source blocklists and refreshed daily from live temp-mail providers. The blocklist is deduplicated and filtered to remove legitimate providers like Gmail and Outlook.
How fast is the disposable email check?+
Cached lookups answer in under 5 milliseconds because the blocklist runs in memory. Unknown domains fall back to live MX-record verification, which adds a DNS round-trip but catches brand-new temp-mail providers.
Should I block disposable emails at signup?+
Treat the verdict as a strong signal rather than a hard block. Blocking throwaways protects free trials and referral programs from abuse, but failing open when the API is unreachable keeps real users unaffected.
Do you store the email addresses I check?+
No. Lookups match only the domain part of the address against the blocklist, and no addresses are persisted. The web checker keeps a rotating public feed of domains checked, never full addresses.
Automate this check in your signup flow
The web checker runs on the same API you can call from your backend — one GET request, a boolean verdict, batch up to 100 emails.