Receive OTPs instantly
Copy the address into a signup or login form. OTPs, confirmation links, and routine notifications will appear in the same inbox. The list polls automatically, and you can also refresh it manually to check the latest status.
Built for developers and QA
Developer test email
Developer test email
Instant OTP delivery
Create a dedicated inbox to verify that signup, login, and automated workflows actually deliver email.
Current email addresspreview@tempgreen.com
Receiving mailTime left 03:00:00
Inbox
0Only a real email counts as a pass
A test inbox is more than placeholder text—it’s an observable test endpoint
When a signup API returns success, the real questions are just beginning: Was the right language selected for the template? Is the OTP readable? Does the link point to the correct environment? Did the email arrive within an acceptable time? TempGreen brings these results together in a temporary inbox with no signup required.
Isolate every test run
Get a new address for each use case. The old address is destroyed, and the new one starts with a fresh default 3-hour lifetime. Separate test runs no longer share old messages, making failures easier to reproduce.
Extend the observation window as needed
The default lifetime is enough for most manual checks. For delayed queues or longer workflows, add 3 hours at a time—up to 24 hours—without switching inboxes mid-test.
From API success to user deliveryComplete a check in three steps
Include the email path in every pre-release check
How does a test inbox receive OTPs? No plugin or account is required. Use the temporary address as a short-term test identity and verify the entire journey from sending to the email body.
- 1Copy the current addressPaste it into the signup, login, password-change, or notification settings of the product under test.
- 2Trigger a real sendDon’t check only the API response; let the job queue, template service, and delivery pipeline run end to end.
- 3Open and verify the emailCheck the sender, subject, OTP, button links, mobile line breaks, and language.
Use it where it fits
When to use a developer test inbox
A short-term inbox prioritizes isolation and speed, making it ideal for a single task, regression run, or temporary identity. It is not a long-term account-recovery inbox and should not hold business records that must be kept permanently.
Signup and login regression
Continuously verify OTPs, magic links, welcome emails, and resend behavior without filling your personal inbox with test data.
Automated task acceptance testing
Check the subject, status values, and target environment of CI, monitoring, or workflow notifications.
One-time downloads and trials
Receive short-lived download links while reducing the chance of your real address entering unfamiliar marketing lists.
Set clear boundaries
What’s the difference between a temporary, disposable, and anonymous email?
These terms often refer to similar products, but each emphasizes something different. “Temporary email” focuses on the lifetime, “disposable email” on one-time use, and “anonymous email” on hiding your real address. TempGreen’s homepage tool offers both short-term access and no-signup use; its primary purpose is receiving test and verification emails.
If you need to keep receiving bills, account-recovery messages, or team notifications, use your own long-term email. If you want to hide your real address while forwarding mail over time, choose the separate email-forwarding feature on this site. The two functions are kept out of one combined homepage panel so a short-term address is not mistaken for a lasting identity.
Compare address lifetimes3 hours by default, up to 24 hours
Once the countdown reaches zero, the address is no longer suitable for continued testing. If you need more observation time, extend it before expiry. For a new test run, switch to a new address so message ownership stays clear.
Choose the right email identity
Temporary inbox or forwarding alias?
Both reduce exposure of your real email, but their retention, viewing location, and ongoing management are completely different. Consider how long the task will last before choosing one.
| Need | Temporary inbox | Forwarding alias |
|---|---|---|
| One-time signup or OTP | Ideal—open the page and start receiving | Usually no need to create a long-term alias |
| Developer and QA regression | Ideal—change the address for each run to isolate data | Ideal for continuously monitoring the same test identity |
| Need to keep receiving mail | Not suitable for long-term reliance | Ideal—forward mail to your real inbox |
| On-site mail retention | Until the temporary address expires | View up to 30 days of archives after logging in |
Troubleshoot delivery first
What if the OTP inbox has no new email?
First, confirm that the copied address exactly matches the address on the sending page, then wait for the job queue to finish and click Refresh. Some services reject temporary email domains as a sender-side policy; this does not mean the inbox is broken. Delays can also occur in template rules, the sending queue, or the delivery stage.
In a development environment, check the application logs, job-queue status, and email-service response together. Do not judge success solely by an “API returned 200” result. If resending still produces nothing, try another address as a comparison to distinguish an individual address issue from a problem in the full delivery pipeline.
Open the email diagnostics guideRecommended troubleshooting order
Address spelling → Send job → Queue status → Sending-service response → Inbox refresh → Sender-domain policy. Following this order and keeping evidence makes the root cause easier to find than repeatedly clicking “Resend.”
Frequently asked questions
Test email and OTP delivery FAQ
Before using a temporary address in a real workflow, learn about its lifetime, privacy boundaries, and best use cases.
Do I need to sign up to create a test email?
No. Open the homepage to get a temporary address and dedicated inbox. A forwarding alias is a separate long-term feature and requires verification-code login for management.
How long can a temporary email be kept?
The default lifetime is 3 hours. You can add 3 hours at a time as needed, up to 24 hours from creation. The countdown always shows the remaining time.
Can I use it to receive a login OTP?
Yes, as long as the sender allows delivery to this domain. Once the OTP email arrives, it appears in the list and you can click it to view the full message.
What happens to the old email after I switch addresses?
The old inbox is destroyed, and the new address starts a fresh 3-hour countdown. Save any information needed for the current test before switching.
Why does the homepage show two demo emails?
Demo emails show how the list and reading pane work and do not count toward the number of real emails. When the first real email arrives, the demo content automatically moves aside.
Can I use it as a recovery email for an important account?
Not recommended. The address expires, so long-term access cannot be guaranteed. Banks, payment services, work accounts, and any service requiring account recovery should use a permanent email address.
Run a real email flow now
Return to the temporary inbox, copy the address, and verify the full journey from signup and sending to opening the message.