Disposable Email Checker
Block Mailinator, YOPmail, Guerrilla Mail, and 50,000+ other throwaway email services before they enter your user database.
- What is a disposable email checker?
- A disposable email checker tells you whether an address belongs to a throwaway inbox — the kind that exists for ten minutes to get past a signup form. Mailbeam matches the domain against a list of more than 50,000 disposable providers, updated continuously, and returns disposable_domain as the reason code so your signup flow can reject it without guessing.
Enter an email or domain to check it against known disposable providers.
What Mailbeam checks
Every verification runs 7 checks in parallel and returns a structured result in under 100ms.
50,000+ disposable domains
Continuously updated database of known temporary email services. New providers are added within hours of detection.
Real-time detection
Check any email address against the disposable database in under 10ms. No delay, no polling.
Subdomain and alias detection
Many disposable services use subdomains (user@mail.mailinator.com) or plus-addressing. Mailbeam normalizes and checks all variants.
Combined with full verification
Disposable detection is one of 7 checks returned with every verification. No separate API call needed.
Customizable response
Block, warn, or allow disposable emails depending on your use case. The result includes a boolean 'disposable' flag for easy conditionals.
False-positive safe
Mailbeam distinguishes between disposable services and legitimate privacy-focused email providers to minimize false positives.
How it works
Extract the domain
From the submitted email address, Mailbeam extracts and normalizes the domain, handling subdomains and aliases.
Database lookup
The domain is checked against Mailbeam's continuously updated database of 50,000+ known disposable and temporary email services.
Result returned
The verification response includes 'disposable: true|false' alongside the full check results and deliverability score.
Your code decides
Use the flag in your business logic — hard reject, soft warn, or allow with a note. The decision is yours.
When to use it
Free trial abuse prevention
Serial abusers create new accounts with disposable emails to get unlimited trials. Block them at signup before they cost you real resources.
Referral program integrity
Referral programs are exploited by creating multiple disposable accounts. Disposable detection stops this at the source.
Waitlist quality
Pre-launch waitlists filled with disposable emails are worthless. Validate at signup to ensure your list contains real people.
Marketing list hygiene
Disposable addresses in your marketing list generate zero engagement and hurt your sender reputation.
Frequently asked questions
How many disposable domains does Mailbeam detect?
The database contains 50,000+ domains and is updated continuously. When new disposable services appear, they are typically added within 24-48 hours.
Does Mailbeam detect all disposable emails?
No checker can detect 100% of disposable emails — new services appear constantly. However, Mailbeam's database coverage is among the most comprehensive available, and the continuous update model means new services are caught quickly.
Can I use disposable email detection without the full verification?
The disposable check is part of the standard verification response. There is no separate disposable-only endpoint — but since all checks run in parallel, the full verification is just as fast.
What about privacy-first email services like ProtonMail?
ProtonMail, Tutanota, and similar privacy-focused services are NOT classified as disposable. They are legitimate email providers, just privacy-conscious. Mailbeam marks them as free providers, not disposable.
Ready to integrate?
Free tier includes 1,000 verifications/month. No credit card required.