Temp Email Checker
Check syntax, known disposable providers, role prefixes, and MX records. We do not probe the mailbox.
How It Works
FormatDomain & MXDecisionCheck Temp email from code
Call the public endpoint from signup. You get a verdict, MX hosts, and flags — not an SMTP mailbox probe.
curl -X POST https://reloop.sh/api/tools/v1/temp-email-checker \
-H "Content-Type: application/json" \
-d '{"email": "koxow38027@prodbits.com"}'Easily connect with your AI agents
Connect Reloop to any AI agent or MCP client in minutes.
MCP Server
1# Connect Claude to Reloop2claude mcp add reloop \3 -e RELOOP_API_KEY=rl_xxx \4 -- npx -y reloop-mcpConnect Claude Desktop, Cursor, or OpenClaw directly to Reloop. Auto-discovered tools for send, status & logs with zero glue code.
Developer CLI
1# Send transactional email2reloop emails send \3 --to user@example.com \4 --jsonDeterministic CLI for humans and agents. Built with machine-readable JSON output, stdin piping, and live webhook streaming.
Agent Skills
1# Install CLI agent skill2npx skills add \3 reloop/reloop-skills \4 --globalEquip Cursor, Claude Code, and autonomous agents with domain knowledge on Reloop templates, batching, and deliverability.
Frequently asked questions
Basics
A disposable — or temporary, throwaway, burner — 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.
Because 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.
Accuracy
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' — 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.
Privacy & API
Nothing is written to a database, added to a list, or used for marketing. Request logs may include the domain and verdict, never 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. Nothing here is locked behind a proprietary service.
Email API
for Developers
Free plan: 3,000 emails a month. No credit card.