Guides
Temporary Email Expiration and Verification Troubleshooting
What happens when a 10-minute inbox expires, why recovery is impossible, and how to catch verification mail before the timer ends.
When a mailbox on this site hits 10 minutes, access ends. There is no password reset, no “recover expired address” form, and no way for support to reopen the same inbox. That is intentional. This page is the troubleshooting guide for the timer, delayed messages, and wrong addresses.
What expiration does here
A mailbox is created with a fixed lifetime (10 minutes). The homepage shows a countdown based on that expiry. When time is up—or you delete the mailbox:
- The session cookie is no longer accepted for that inbox
- The mail-ingest Worker rejects new mail for that local-part
- A scheduled cleanup job marks the mailbox expired, deletes stored message objects from R2, deletes message rows from D1, then removes empty mailbox records
You cannot read old messages after that. You cannot recreate “the same” address on demand. If you still need a disposable inbox, create a new one and start over.
That is why recovery is unavailable: the data is gone by design, not hidden behind a restore button. See how messages are sanitized and deleted.
Catch the code while the mailbox is alive
Most “it didn’t work” reports are timing, not missing infrastructure.
- Create the inbox first. The timer starts when the mailbox exists, not when the other site sends mail. Have the address ready before you submit.
- Copy, do not retype. Use the copy control. A single wrong character is a different mailbox that will never receive the message.
- Keep this tab open. The inbox polls while it is active. A manual refresh is available, with a short cooldown so it cannot hammer the API.
- Open the newest message first. Verification subjects are often generic (“Your code”, “Confirm your email”).
- Leave time to spare. If the countdown is nearly done and mail has not arrived, create a new mailbox and request a new code. Do not hope the old one will linger.
If the message never shows up
Work through this list in order.
Wrong address. Confirm the form still shows the exact string you copied, including the domain mail.10mintempemail.com.
Mailbox already expired. Requesting a resend to a dead address will not help. Create a new inbox, then ask the other site for a new message.
The other site is slow. Some vendors take several minutes. If you are inside the window, wait and refresh. If you are not, start a new mailbox.
The site rejected the domain. Many services block known disposable domains. That is their policy. Use a permitted permanent address or alias. This site does not help bypass those blocks.
Mailbox full or message too large. Each inbox has a cap on stored messages and on message size. Oversized mail is rejected at ingest. Open what did arrive, or create a fresh mailbox.
You are on a different browser or device. Ownership is an HttpOnly cookie on the browser that created the mailbox. Another phone or a private window is a different session.
Safe handling of verification messages
- Read the code or link only for the signup you started
- Do not forward the message; this inbox cannot send anyway
- Do not paste one-time codes into pages you did not open yourself
- Remember the operator can see mail while the box is alive—do not use this for high-stakes secrets
HTML is sanitized before display. Scripts and a list of dangerous tags are stripped. Treat unexpected attachments with the same caution you would in any mail client. Allowed types are a small list (common images, PDF, text/CSV, ZIP); other types are not stored.
Why support cannot restore an inbox
Mailbox identifiers are not a customer account. After cleanup, D1 no longer has the row and R2 no longer has the objects. Even if someone still has the old address written down, the ingest Worker will not deliver to an expired or missing recipient.
If you already typed a disposable address into an account you now need, change that account’s email to an address you own while you are still logged in. If you cannot log in, contact that service. We cannot replay their verification mail.
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