Testing signup emails with a temporary inbox
Check a real signup email from the send request to the message a user opens. A manual test for your own app, with a checklist for the failure cases.
Maintained by Dayfly Mail · Updated
Start with one address and one send
Open Dayfly Mail and create an inbox. One hour is a reasonable choice for a manual test; use the 10-minute entry for a short check you can finish now. Copy the full address into a signup form in an app you own or are allowed to test.
Use made-up profile data. Keep this inbox open, and trigger one signup email. Creating a second address halfway through the test makes it harder to work out where the first message went.
Check the send request, then the inbox
Keep the app's send log beside the inbox. Record when you triggered the send and any message ID your provider supplies. A successful response from your app is only the first checkpoint.
| What you can observe | What it establishes |
|---|---|
| The app accepted the signup or send request | Your app reached that point in its workflow. |
| The sending provider reports its delivery status | The provider's part of the delivery attempt; inspect any bounce or delay. |
| The message appears in the Dayfly inbox | This message reached the receiving inbox. |
| The text or HTML body opens correctly | This client can read that version of the message. |
| Your own verification link completes the expected action | That particular end-to-end signup path worked. |
Read the message as the recipient would
Check the subject, sender, plain-text body and HTML body. Follow only the verification link for the app you are testing, and confirm the expected result in that app. An email appearing in the list does not test the link or its expiry behavior.
Dayfly Mail receives text and HTML email but does not store attachments. It cannot validate your application's sending code or promise how another mailbox provider will render the message.
A receive-and-delete check we ran
On 19 October 2026, we sent one controlled multipart email to a newly created Dayfly inbox. The message arrived, its text and HTML views opened, and a manual destruction request removed the inbox from the interface.
That was one successful check of the receive, read and manual-delete path. It was not a delivery-speed benchmark, an uptime measurement or a test of scheduled expiry cleanup. Keep those tests separate when you write your own results.
Save a short test record
A small record is enough to reproduce a failure. Use a test case name, the time of the send, the sending provider's status and the result at each checkpoint. Redact the address, access link, verification code and personal details before sharing screenshots.
- Create an inbox with enough lifetime left for the test.
- Trigger one email from the app you are testing.
- Compare the send log with the message that arrives.
- Open the text and HTML body, then check your own verification flow.
- Record the result and destroy the test inbox when finished.
When the manual inbox is not enough
If no message arrives, work through the missing-email checks before changing the test address. If you need to test expired codes, use your application's code-expiry rules; changing the inbox lifetime does not change those rules.
The public Dayfly interface has no developer API. For automated test suites, choose a testing setup with a supported automation interface. For a manual check, a temporary inbox is useful when your app accepts the address and you do not need the messages later.