Disposable Email Detector
Paste an email address or domain to see whether it belongs to a known disposable, temporary, or throwaway-inbox provider. Runs entirely in your browser — no server, no DNS lookup, no sign-up.
What this tool does
The Disposable Email Detector tells you whether an email address (or a bare domain) belongs to a known disposable, temporary, or throwaway-inbox provider — the kind of self-destructing mailbox people use to sign up without giving out their real address. It runs entirely in your browser: nothing is sent to a server, it works offline, and there is no sign-up. It is also lookup-only — it never performs a DNS, MX, or SMTP query, so it answers "is this a known burner domain?", not "does this mailbox exist?".
Paste an address (a Name <addr> or mailto:addr wrapper is unwrapped
automatically) or just a domain, and it reports the domain it parsed, whether
that domain is disposable, the specific provider it matched, and a short reason.
How it decides
| Signal | Example caught |
|---|---|
| Exact domain match | [email protected], [email protected] |
| Alias domains | sharklasers.com, grr.la, spam4.me (Guerrilla Mail) |
| Subdomains | inbox.mailinator.com → matches mailinator.com |
| Throwaway keyword in a label | tempmail.example.io, a throwaway label |
| Bare domain input | yopmail.com (no local part needed) |
The built-in list covers the most common throwaway services — Mailinator,
Guerrilla Mail, 10 Minute Mail, Temp-Mail, YOPmail, Maildrop, Trashmail, Getnada
and many of their alias domains. The keyword heuristic is deliberately
conservative: it only fires when a whole domain label is a throwaway keyword
(so contemporary-art.org is not flagged just because it contains "temp").
Signal, not a guarantee
A Disposable: no result means the domain is not on the known list — it does not prove the mailbox is real or that the domain is reputable. New throwaway services launch constantly, and a determined user can always register a fresh domain. Treat the result as a fast, private first-pass filter: it catches the overwhelming majority of casual burner-inbox sign-ups before you ever touch the network, and you can layer slower checks (DNS/MX, double opt-in) on top when a hard guarantee matters.
Why detect disposable addresses?
Disposable inboxes are great for users who want privacy, but they are a problem when you need a durable way to reach someone: trial-abuse and one-account-per-user limits get bypassed, transactional and password-reset emails bounce into a mailbox that vanished minutes later, and your deliverability and list quality suffer. Catching a throwaway domain at the point of sign-up — instantly, privately, and right in the browser — lets you nudge the user for a permanent address before the bad data ever lands in your database.
FAQ
Does it verify that the mailbox actually exists?
No. The detector is lookup-only: it never performs a DNS, MX, or SMTP query. It answers "is this domain a known burner provider?", so a Disposable: no result means the domain is not on the built-in list — not that the mailbox is real or deliverable. Layer a DNS/MX check or double opt-in on top when you need a hard guarantee.
Can I check a bare domain, or does it need a full address?
Both work. You can paste yopmail.com on its own, a full address like
[email protected], or wrapped forms — Name <[email protected]> and
mailto:[email protected] are unwrapped automatically before the domain is
extracted and checked.
Are subdomains and alias domains detected too?
Yes. inbox.mailinator.com matches the parent mailinator.com entry, and the
list includes popular alias domains such as sharklasers.com, grr.la, and
spam4.me (all Guerrilla Mail). There is also a conservative keyword
heuristic that only fires when an entire domain label is a throwaway keyword
— so tempmail.example.io is flagged, but contemporary-art.org is not.
Is the address I paste sent to a server?
Never. The check runs entirely in your browser against a built-in domain list, works offline, and no address, domain, or result leaves your machine.
Developer & Automation Access
Run it from the terminal
Same engine as this page, headless — via the gizza CLI:
gizza tool disposable-email-detector '[email protected]'New to the CLI? Get gizza →
Open it by URL
Pre-fill and auto-run this tool with query parameters — the names match the API/CLI:
https://gizza.ai/tools/disposable-email-detector/?input=someone%40mailinator.comMachine-readable descriptor: tool.json — title + parameters JSON Schema for agents.