Address layer
Verify the local-part, domain, and countdown. After changing addresses, do not keep using the address in an old page or outdated test data.
From Symptoms to Evidence
How to troubleshoot missing verification emails
Don’t keep clicking Resend. Confirm the address first, then check whether the app actually created a send job. Finally, distinguish queue delays, delivery rejections, and inbox refresh issues.
4 layersThe diagnostic boundary from sending to receipt
1 changeChange only one variable per round
3–5 minutesTypical observation window for transactional email
Start with a one-minute check
Rule out the most common input and status errors
After copying the address, check for leading or trailing spaces, missing characters, and the test environment. Confirm that the temporary address is still valid and that the destination shown on the sending page exactly matches the inbox address.
Application layer
Check the triggering API response, application logs, and template selection. A success message on the page does not mean the backend send job has entered the queue.
Delivery layer
Record the email provider’s message ID, rejection code, and retry status. The sender may actively block disposable email domains.
Diagnostic path
Advance one layer at a time
Keep timestamps and identifiers so developers, QA, and email providers can discuss the same message.
Reproduce it once
Record the exact send time, environment, user ID, and complete recipient address.
Check the job queue
Confirm when the job was queued, dequeued, and retried. Do not treat an API 200 response as successful delivery.
Check the provider response
Look for accepted, deferred, or bounced, along with the corresponding SMTP reason.
Refresh and compare
Refresh the inbox manually, then send once more to a new address to determine whether the issue affects only one address.
When should you change the address?
If the old address is still valid, the send job is working, and the sender explicitly rejects disposable domains, changing the address is useful only for comparison—it cannot bypass the sender’s rules. If the issue is queue delay, changing the address only creates a second set of variables.
Back to inboxNo send log at allFirst check the frontend form, environment variables, and backend job creation.
Received but delayedCompare the queue time, provider receipt time, and the time TempGreen received the message.
Disposable domain explicitly rejectedRespect the sender’s policy and use a long-term email address for important accounts.
Only the content is wrongThe email has arrived. Check the template language, variable substitution, and link environment.
Common conclusions
Questions that are easy to confuse during diagnosis
How long should I wait before it’s abnormal?
Most verification emails arrive within a few seconds to a few minutes. Check the application’s stated expectations and queue status first. If the message still has not arrived after the code expires, record it as a failure instead of continuing to wait.
Will refreshing the inbox resend the email?
No. Refreshing only asks TempGreen for existing messages; it does not call a third-party product’s resend API.
Can a temporary email address receive every verification code?
No. Senders may reject any address or domain under their own risk-control policies. TempGreen cannot change the sender’s decision.
Why can’t I open an attachment?
Temporary inboxes do not retain attachments, and messages larger than 100 MB are rejected. If you need attachments, use a forwarding alias and check its tier-specific retention rules.