Disposable Email Detection
Screen signups for temporary/throwaway emails with a risk score, using a local domain database
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
About this tool
Disposable/temporary email services let people sign up for something using a throwaway address that expires shortly after - useful for spammers or fake account creation, problematic for services that need real, reachable users. This tool checks an email against a local database of known disposable email domains and gives a risk score, without needing to contact any external service.
How to use this tool
- Enter email addressProvide address or domain to evaluate temporary-email risk.
- Run disposable-domain checkMatch domain against known throwaway provider database.
- Review risk resultInterpret flagged domain score with signup policy context.
- Apply verification policyTrigger additional checks for suspicious signups if needed.
Should you block disposable emails?
Temporary email addresses expire within minutes or hours, so accounts created with them cannot be reached for password resets, receipts or important notices. Blocking them reduces fake sign-ups, trial abuse and spam.
Block carefully: some people use privacy forwarding services, such as Apple’s Hide My Email, which are real, reachable addresses. A risk score lets you warn or add extra checks instead of rejecting every address outright.
Key features
- Helps reduce fake or low-quality registrations.
- Runs quickly without external API dependency.
- Supports fraud-prevention decision workflows.
- Useful for SaaS, ecommerce, and community onboarding.
Common uses
- Filtering disposable emails at account signup.
- Scoring lead quality before sales outreach.
- Reducing trial abuse in subscription products.
- Supporting trust-and-safety moderation workflows.
Tips for better results
- Use as one signal alongside confirmation and behavior checks.
- Maintain clear policy for false positives and appeals.
- Recheck domain lists regularly for new providers.
- Log detection trends to tune anti-abuse systems.
Mistakes to avoid
- Blocking users solely on this signal with no fallback.
- Assuming database covers every newly created domain.
- Skipping email verification flows after domain checks.
- Treating corporate relay domains as always high-risk.
Frequently asked questions
It checks the email's domain against a local database of domains known to be temporary/throwaway email providers - built from publicly known lists of disposable email services.
Yes - new disposable email services appear over time, so any static database can eventually miss brand-new providers not yet included in the list. It's a strong first-line signal, not a perfect guarantee.
It's one useful signal among several - combining it with other verification methods (like email confirmation links) gives more complete protection than relying on disposable-domain detection alone.
It depends on the product. Free trials and giveaways benefit from blocking them; newsletters may be better off allowing them, since some privacy-minded users prefer forwarding addresses.
Not quite. Services such as Apple's Hide My Email or SimpleLogin forward to a real, long-lived inbox, while disposable addresses usually expire within minutes or hours.
Email confirmation links, rate limits per IP, CAPTCHA or bot challenges on the signup form, and watching for bursts of similar addresses.