Copy the isolated address
Every address has its own token and countdown. Add it to signup, password recovery, or notification flows to keep test data out of your personal inbox.
Email workspace for developers and QA
Receive test emails
instantly in a test inbox
Create an isolated receiving environment for verification codes, signup notifications, and HTML templates. See exactly what each test delivery looks like without using your personal inbox.
* Temporary addresses are valid for 3 hours by default and can be extended up to a maximum lifetime of 24 hours.
Verification code received482731 · Just now
Template check completeSubject, preview, and body are readable
Live tool
A dedicated inbox for observing test emails
Start sending as soon as the address is generated. The list polls automatically; when a real email arrives, demo messages leave the list so they never mix with your test results.
Inbox
0 real emailsFrom send to review
Email testing in three clear steps
A test inbox is not an email-sending service—it is a receiving-side observatory. Send from your own app, automation platform, or SMTP environment, then verify here what users will actually see.
Trigger the business email
Run a real development or staging flow. Verification codes, welcome emails, alerts, and transactional notifications can all follow the original delivery path.
Review the complete result
Check the sender, subject, preview text, arrival time, and body. If delivery fails, investigate identity, queues, DNS, and content layer by layer.
What to check
Don’t just check whether it arrived
A test email reaching the inbox only proves that the receiving path works. Reliable email testing also checks whether the subject is truncated, preview text exposes template placeholders, verification codes stand out, buttons are clear, and the plain-text fallback communicates the same action.
Delivery path
Content structure
Call to action
Best for testing
Build test cases around real user actions
For signup codes, check expiration and resend behavior. For password resets, check the link domain and one-time use. For billing notices, check the amount, currency, and order number. For team invitations, check the inviter, workspace, and expiration boundary. Action-based test cases reflect production risk better than a single template screenshot.
After testing, don’t leave a temporary address in a real user profile. Once it expires, it stops receiving mail. Temporary addresses are for short-term verification, not account recovery or long-term business contact.
Tool boundaries
Temporary inbox, test inbox, or permanent forwarding?
These terms are often used interchangeably, but they serve different lifecycles. Choose based on how long the task lasts and whether you need a lasting identity to reduce future migration work.
| Option | Best for | Retention | Not suitable for |
|---|---|---|---|
| MSGTMP test inbox | Verification codes, templates, notification flows, and short-term integration testing | 3 hours by default, up to 24 hours | Long-term identities and account recovery |
| Personal inbox | Real accounts and conversations that need ongoing follow-up | Retained long-term by the email provider | High-volume automated testing and dirty-data isolation |
| Permanent forwarding alias | Long-term public addresses, source separation, and forwarding to a real inbox | Managed after login, with 30-day archiving | Instant, no-identity testing |
Development scenarios
Cover the four email handoff points most likely to fail
From code commit to final reading, an email may pass through template rendering, queues, sending services, and the receiving side. A test inbox provides a stable observation point, helping teams turn “not received” into a verifiable question.
Verification codes and login
Check the 6-digit code, the business-defined 10-minute validity period, how old and new codes interact after a resend, and whether mobile users can identify and enter the code quickly.
HTML template regression
Review image widths, paragraph hierarchy, button labels, and preview text in the received message. Catch unreplaced variables and overflowing content early.
Queues and timing
Record trigger and arrival times to spot delayed, duplicated, or out-of-order async jobs. Change one variable at a time to isolate issues faster.
Privacy and test data
Use random identities and non-production data. Never send real customer information, passwords, keys, or irreversible sensitive credentials to a temporary address.
Didn’t receive the test email?
First determine whether it was sent or delivered
Check application logs and sending-service events to confirm the request entered the queue. Then review sender-domain authentication, bounce reasons, rate limits, and content policies. Narrow the issue down with evidence instead of repeatedly clicking “Resend.”
Delivery diagnostics
Troubleshoot missing test emails with evidence, not guesses
First, confirm that the application generated a message for the correct destination address and record its message ID. Next, check whether the sending platform shows accepted, delivered, delayed, or bounced. If there is no platform event, the issue is usually still in the application or queue. Then check SPF, DKIM, DMARC, and sender-domain status, followed by template content policies.
Sending side has a record
Keep the retention period, recipient address, message ID, and provider response. For a 4xx response, follow the guidance, wait, and retry. For a 5xx response, fix the address, identity, or policy before trying again—don’t blindly replay the message.
Receiving side is still empty
Click refresh manually and confirm that the current address exactly matches the one entered in your application. Changing the address creates a completely new inbox; messages sent to the old address will not migrate.
Frequently asked questions
Straight answers about email testing tools
Here’s how expiration, visibility, and intended use work. For real accounts and long-term contact, use a controlled personal inbox or a permanent forwarding address instead.
How long can I use a test email address?
New addresses are valid for 3 hours by default. You can extend the time from the toolbar, but a temporary inbox has a maximum total lifetime of 24 hours. When the countdown reaches zero, the address stops receiving mail.
Why are two demo emails shown first?
Demo emails show how verification codes and notifications appear in the reading pane, so an empty inbox still explains the workflow. Once the first real email arrives, the list shows only real data; demo rows are never mixed with your results.
Can I use it to test email verification codes?
Yes. Copy the address into a development or staging environment, trigger a verification email, and check the code length, validity period, resend logic, subject, and body. Don’t use it as the long-term recovery identity for a production account.
Does MSGTMP send test emails for me?
No. MSGTMP is a receiving and reading tool, not an SMTP sending service. Your application, automation platform, or email provider still sends the message; we provide an isolated receiving endpoint for reviewing the result.
Will old emails appear after I change the address?
No. Changing the address creates a new inbox with a fresh 3-hour countdown and retires the old one. To keep monitoring the old address, don’t switch addresses—extend the current inbox instead.
What’s the difference between a temporary inbox and permanent forwarding?
A temporary inbox requires no login and is ideal for short-term testing. Permanent forwarding requires login to manage aliases, forwards incoming mail to a real inbox, and includes 30-day archiving. They serve different lifecycles, so the homepage keeps their controls separate.