Disposable Email Checker
Instantly find out if an email address is disposable or temporary. Free, no signup required.
Need to block disposable emails in your app?
Integrate our API in 60 seconds. 100 lifetime API checks, no credit card required.
Get Free API Key →What is a disposable email checker?
A disposable email checker tells you whether an email address comes from a temporary or throwaway provider. Services like Mailinator, Guerrilla Mail, 10MinuteMail, and Temp-Mail give users an inbox they can read for minutes or hours, then discard. This tool extracts the domain and matches it against a live database of 334,000+ known disposable providers.
Paste an email address
Type or paste any address into the checker above. We pull out the domain automatically. No login or credit card needed.
We check the domain
The domain is matched against a continuously updated list of disposable, temporary, and burner email providers — including wildcard subdomains and freshly rotated domains.
See the result instantly
You find out right away whether the address is disposable or legitimate. Nothing is sent to the inbox — it is a silent domain lookup.
Block them in your app
The same database powers the disposable email detection API. One GET request returns one boolean you can run inline at signup.
How to read the result
Detection is domain-based. Every address at a flagged provider gets the same verdict. A clean result does not prove the mailbox exists — only that it is not a known throwaway domain.
Disposable
The domain is a known temporary provider. Treat this as a risk signal at signup — reject it, or route the user through a stricter path. Example API response: {"temp": true}
Legitimate
The domain is not on the disposable list. Gmail, Outlook, and company domains fall here. It can still bounce or be a fake local-part — that is email verification, not this check. Example: {"temp": false}
Use cases for a disposable email checker
Marketers paste one address. Developers wire the same lookup into every signup. Both jobs use this database.
Screen a single signup
Paste an address from a form, CRM, or support ticket and see immediately whether it is throwaway before you spend time on the lead.
Block fake signups
Stop Mailinator, 10MinuteMail, and Guerrilla Mail from creating free-trial accounts, claiming promos, or polluting analytics.
Protect sender reputation
Disposable inboxes expire within hours. Sending to them produces hard bounces that quietly damage your domain reputation.
Qualify inbound leads
A disposable address is a strong low-intent signal. Flag it in your CRM so sales effort goes to reachable contacts.
Check disposable emails via API
This page checks one address. To block temp mail automatically at signup, call the same database from your backend.
curl "https://tempmailchecker.com/check?email=test@mailinator.com" \
-H "X-API-Key: YOUR_API_KEY"
{"temp": true}
100 lifetime API checks, no credit card. See the API documentation, code examples, or a full walkthrough of how to block disposable emails.
Get Free API KeyDisposable email checker FAQ
The questions people type when they want to check if an email is disposable
What is a disposable email checker?
A disposable email checker tells you whether an email address comes from a temporary or throwaway provider. This tool takes any address, extracts the domain, and matches it against a live database of 334,000+ known disposable, temporary, and burner email providers — including Mailinator, Guerrilla Mail, 10MinuteMail, YOPmail, and Temp-Mail.
It does not create a temp inbox and it does not send mail. For the product definition, see what disposable emails are. To block them automatically, use the detection API.
How do I check if an email is disposable?
Paste the email address into the checker above and click Check. We extract the domain and tell you instantly whether it is a disposable or temporary provider. You can check as many addresses as the page rate limit allows, with no account.
To check every signup automatically, call GET /check?email=… from your backend. Same database, one boolean. See how to block disposable emails.
Is this disposable email checker free?
Yes. Single-address checks on this page are free and need no account. To block disposable emails automatically at signup, use the detection API — 100 lifetime API checks, then paid plans from $12/month.
What's the difference between a disposable email checker and email verification?
A disposable email checker only tells you whether an address comes from a temporary provider. Email verification goes further: it confirms whether a specific mailbox exists and can receive mail. Use this checker to screen signups; use a verification suite for bulk list cleaning. Side-by-sides live on alternatives, vs ZeroBounce, and vs Kickbox.
Why should I block disposable email addresses?
Disposable addresses are used to create fake accounts, claim free trials repeatedly, and abuse promotions. They also inflate bounce rates and pollute analytics. Filtering them out keeps your data clean and your outreach pointed at real, reachable people. The how-to is on block disposable emails.
Which disposable email providers does this detect?
The checker covers 334,000+ domains, including Mailinator, Guerrilla Mail, 10MinuteMail, YOPmail, and Temp-Mail, plus the long tail of smaller throwaway sites that rotate domains to evade static lists. Browse recently added domains or the dataset stats.
Are free webmail addresses like Gmail disposable?
No. Gmail, Outlook, Yahoo, and other permanent personal inboxes are not disposable. This checker only flags known temporary / throwaway providers.
Does checking an address send it an email?
No. The check is a silent domain lookup against our database. Nothing is sent to the address. We do not store the full email — only the domain, the verdict, and a timestamp for rate limiting.
Can I check disposable emails in bulk?
This page checks one address at a time. For signup volume, call the detection API from your backend — one request per address, same boolean. Get a key on signup.