Disposable email checker
Check if an email uses a disposable or temporary domain
Paste one address, a CSV export, or a list of domains to find common temp-mail services like mailinator.com, yopmail.com, guerrillamail.com, and 10minutemail.com before accepting signups or importing leads.
Check emails or domains
The watchlist check runs in your browser against 55 common temporary, throwaway, and alias-style domains. Use Verifly verification for mailbox, catch-all, and deliverability signals.
Disposable detection is one layer
A domain can pass this watchlist check and still bounce, reject mail, or behave as catch-all. Use Verifly for mailbox-level verification before sending or importing a list.
Bulk checking against the disposable watchlist
This tool works on volume. Paste a single address, a whole CSV column, a newline-separated list, or even a block of text containing URLs, and it extracts every email and domain it can find, then matches each one against a watchlist of known temporary and throwaway providers like mailinator.com, yopmail.com, and 10minutemail.com. Everything runs in your browser, so nothing leaves the page.
The result groups addresses into disposable and non-disposable so you can lift the risky ones out before they reach your CRM or signup database. Browse the full underlying list on the disposable email domains reference.
Why disposable addresses hurt more in bulk
One disposable signup is a nuisance; a list full of them is a reputation problem. Temporary inboxes are abandoned within hours, so campaigns sent to them bounce, drag down your delivery metrics, and can trip spam-trap and complaint thresholds that get your whole domain throttled. Cleaning them out before import protects the deliverability of every other address you send to.
Disposable domains also distort product analytics: fake trial signups inflate conversion numbers and skew activation rates, leading teams to chase growth that was never real.
From watchlist match to confirmed verification
A watchlist is a fast, free first pass, but new throwaway domains appear constantly, so a clean result means "not currently listed," not "guaranteed permanent." For production traffic, follow the browser check with live verification that also inspects MX records, catch-all status, and the mailbox itself.
The Verifly API at https://verifly.email/api/v1 returns a disposable flag with role, catch-all, and SMTP results, backed by a continuously updated domain list. See the developer API to wire it into signup and import flows.
Frequently asked questions
What formats can I paste into the bulk checker?
You can paste a single address, a newline or comma separated list, a CSV column, or free text that contains emails and URLs. The tool extracts every address and domain it finds and checks each against the disposable watchlist, all in your browser.
Does the checker send my list anywhere?
No. Matching against the disposable watchlist runs entirely client-side in your browser, so the addresses you paste are not uploaded. For deeper mailbox-level verification you would use the Verifly API, which is a separate, opt-in step.
Will it catch every disposable domain?
It catches domains on a curated watchlist, which covers the well-known temporary providers. New throwaway domains appear daily, so a clean result means the domain is not currently listed rather than a guarantee. Pairing it with live verification closes most of that gap.
Should I delete disposable addresses or just flag them?
For cold lists and paid campaigns, removing disposable addresses before you send protects deliverability. For existing accounts you may prefer to flag and monitor them. Either way, keeping them out of active sending lists is what protects your sender reputation.
How is this different from the disposable email detector tool?
The detector focuses on inspecting one address or domain in depth, including MX lookup. This bulk checker is built for screening many addresses at once against the watchlist so you can clean a whole list in a single pass.
How do I check disposables automatically at signup?
Call the Verifly API with a vf_ Bearer key from your backend: GET /verify?email= returns a disposable flag alongside role, catch-all, and SMTP results, so you can block or flag throwaway signups in real time.