Best features
Why choose Reloop temp email checker
100% Free & No limits
This checker is free. It needs no signup and has no credits or expiry.
99.9% accuracy
It checks disposable list, role addresses, and MX records to maximize precision and avoid false positives.
No Account Needed
No API key or account is needed to use the API. It is rate limited per IP.
Real-time sync every 24 hrs
Our disposable-domain list is refreshed every 24 hours to ensure even the latest throwaway domains are caught.
Savings calculator
Calculate what throwaways cost you.
Trial credits, sends, and support time per throwaway account.
Estimated waste
$2,880/ yr($240 / mo)
Stop paying for throwaway emails.
Reloop automatically flags risky contacts before you waste time or money on them. Start with 3,000 free emails per month. Learn more about pricing
Get started freeNo credit card. Wipe that $2,880/yr waste.
Who is it for
Where can I use reloop’s temp email checker?
Anyone who needs to know if an address is real without ever probing the mailbox.
Developers
- Signup protection
- Registration forms
- Auth middleware hooks
- Account creation APIs
- Guest checkout flows
- Profile email updates
- Inbound webhook triage
Fraud & Security
- Free trial gatekeeping
- API credit protection
- Referral fraud defense
- Multi-account blocks
- Promo code validation
- Bot signup mitigation
- Freemium abuse audits
Growth & Marketing
- Product waitlists
- Gated content downloads
- Newsletter subscriptions
- Webinar registrations
- Demo request forms
- Lead qualification
- Pre-campaign list scrubs
Support & Trust
- Payment dispute triage
- Chargeback investigations
- Suspicious user audits
- Customer support tickets
- Admin dashboard lookup
- Abuse incident triage
- Account recovery checks
API Integration
Integrate today in your code.
Body
emailstringrequired- An email address or a bare domain to check (e.g. you@mailinator.com or mailinator.com). We trim and lowercase it before validation.
Request
// No SDK, no API key: it is a plain POST.const res = await fetch( "https://reloop.sh/api/tools/v1/temp-email-checker", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ email: "you@mailinator.com" }), },);
const result = await res.json();{ "input": "you@mailinator.com", "kind": "email", "domain": "mailinator.com", "unicodeDomain": null, "verdict": "disposable", "isValidSyntax": true, "syntaxFailure": null, "isDisposable": true, "disposableMatch": { "kind": "exact", "domain": "mailinator.com" }, "isAllowlisted": false, "isRoleAddress": false, "isFreeProvider": false, "signals": { "syntax": "pass", "disposable": "fail", "role": "pass", "freeProvider": "pass" }, "mxRecords": [ "spool.mailinator.com" ], "confidence": 0.99, "riskScore": 0.95, "flags": [ "DISPOSABLE_DOMAIN", "PUBLIC_INBOX_DETECTED" ]}All tools
Explore all free email & developer tools.
Free Email Validator & List Cleaner
Verify syntax, disposable domains, and active MX records to keep your email list clean.
Email Deliverability & Spam Tester
Send a test email to analyze inbox placement, spam score, and SPF/DKIM alignment.
Email Spoofing & Phishing Checker
Test whether unauthorized senders can forge your domain to deliver phishing emails.
IP & Domain DNS Blocklist Checker
Check your sending IP address and domain against 50+ public DNS blocklists in real time.
DNS Lookup & Record Analyzer
Inspect MX, SPF, DKIM, DMARC, and A records with syntax validation and live diagnostics.
Domain Age & Warmup Checker
Check domain registration age and warmup safety to avoid cold-sending spam filters.
Domain ESP & Email Sender Lookup
Identify all third-party email service providers authorized to send from your domain.
SPF, DKIM & DMARC Checker
Validate email authentication records to guarantee proper sender alignment and security.
Temp & Disposable Email Checker
Detect throwaway inboxes and burner addresses before they bounce or skew signup metrics.
Domain Reputation & Health Checker
Evaluate your domain health score, spam placement risk, and mail configuration flaws.
Lookalike Domain & Phishing Scanner
Detect registered typosquats and lookalike domains impersonating your brand online.
Email Spam Words & Subject Checker
Scan subject lines and body copy for spam trigger words that hurt inbox deliverability.
BIMI & Brand Avatar Checker
Verify your BIMI DNS record and SVG logo to display verified brand avatars in inboxes.
Email HTML Template Editor
Design, edit, and preview responsive HTML email templates across mobile and desktop.
Developer Tools & REST API
Integrate real-time email verification and DNS lookups via our low-latency REST API.
Suggest a New Tool
Need an email or DNS utility that isn't listed here? Suggest a tool and we'll build it.
Stop paying for throwaways emails.
Let's talk.
Reloop automatically flags risky contacts before you waste time or money on them. Start with 3,000 free emails per month.
FAQ
Frequently asked questions.
Paste the address into Reloop's free temp email checker. We parse RFC syntax, match the domain against a ~210,000-provider disposable catalogue (including Mailinator, Yopmail, and Temp-Mail), flag role prefixes, and look up MX records. A disposable verdict means the domain is a known throwaway provider. We did not probe the mailbox.
A disposable email address is a mailbox created on demand that anyone can read without signing up, and that usually self-destructs within minutes or hours. People use them to get past signup walls without handing over a real address.
They stop existing. Once the mailbox expires, every message you send to it hard-bounces, and mailbox providers read sustained bounce rates as a sign that you send to bad lists. That reputation damage applies to your whole domain, not just the throwaway recipients.
Not necessarily. Blocking outright at signup is right for free tiers and trials, where throwaway addresses are used to farm accounts. For newsletters or content downloads, flagging and suppressing later is often enough. Some people simply value their privacy.
Disposable matching is a list lookup: the domain is on the catalogue or it isn't. We also classify role prefixes and look up MX records. New temp-mail providers appear constantly, so a clear result means 'not currently known to be disposable.' It is not a guarantee.
No. We never open an SMTP session or check whether the local-part has a mailbox. MX records only show that the domain publishes a mail exchanger.
The address parsed, the domain is not on the disposable list, and it is not a shared role prefix. If MX records were found, mail can theoretically be routed to that domain. It is not proof of delivery.
No. Consumer mailboxes from Gmail, Outlook, Yahoo and similar providers are free, but they are persistent. They are flagged as free providers so you can apply your own policy. They are not treated as throwaway.
The temp email checker is focused on disposable and throwaway detection at signup time (single address, public API, no key). The free email validator adds bulk CSV cleaning (up to 1,000), fuller health scoring, and list export for campaign hygiene. Use this tool to block burners at registration; use the email validator when you need to clean an entire list.
Nothing is written to a database, added to a list, or used for marketing. Request logs may include the domain and verdict. They never include the mailbox name. The tool is free and needs no account.
Yes. Reloop is open-source email infrastructure, so you can run the same validation inside your own signup flow, self-host the whole stack, or use the hosted API.