Free tool
Disposable email checker.
Find out instantly whether an address is a disposable, throwaway inbox - the temporary-mail services people use to skip real signups. Paste an email or a domain; the check runs right here in your browser. No account, no card.
Checks the domain against a list of known disposable and temporary-inbox providers. Runs entirely in your browser.
Why disposable addresses matter
A disposable signup looks like a real one for about ten minutes. After that it's dead weight - and worse:
- They never engage
- No opens, no clicks, no conversions - just a contact that drags down your engagement metrics and, over time, your sender reputation.
- They cost you money
- Most ESPs bill per contact and per send, so every throwaway address on your list is spend on someone who can't convert.
- They enable abuse
- For free trials and paid products, disposables are how one person becomes a hundred fake accounts.
Disposable is one of three flags worth telling apart - see role, disposable & free addresses for what to do with each.
Disposable email checker FAQ
A disposable (or temporary, or throwaway) email address lives on a domain that hands out short-lived inboxes - the ten-minute addresses people use to clear a signup gate, grab a discount, or dodge a paywall. The inbox is designed to stop existing shortly after it's created, so the person behind it never intended to hear from you again.
Because they dilute everything downstream. A disposable signup never engages, never converts, and quietly drags down your open and click rates. For paid or reputation-sensitive products they're also a common vector for abuse and fake accounts. Blocking them at signup is cheaper than cleaning them out later.
Not exactly - it may accept mail at the moment you check it, which is why verification labels disposables risky rather than undeliverable. The catch is that the inbox is built to expire: deliverable today, gone tomorrow, and never a real subscriber. See our guide on role, disposable, and free addresses for how to handle each.
It compares the domain against a list of known disposable and temporary-inbox providers, entirely in your browser. It's a fast, useful first pass - but new disposable domains appear constantly, so a 'not a known disposable' result isn't a guarantee. Full verification checks a much larger, maintained database and confirms the mailbox too.
Yes. Verifying at the point of capture through the API lets you reject disposable domains before they ever enter your list, alongside catching typos and dead domains. It's the highest-leverage place to filter them - cheaper and cleaner than suppressing them after they've diluted your metrics.
Block disposables across your list
Full verification flags disposables against a maintained database, confirms real mailboxes, and runs at signup via the API - start free with 100 credits.