What a throwaway inbox actually is

A mailbox you borrow for one small errand, then leave behind.

A mailbox you do not keep

A throwaway inbox is a mailbox you borrow for a short errand and then abandon on purpose. You do not put it on a résumé, you do not give it to your bank, and you do not expect it to remember a password reset next spring. Lumenbox, the name on tempmails.us, is built around that narrow job. The homepage hands you a random local-part on this domain, shows the address in one full-width field, with the buttons in a row under it and the inbox table directly below. Four short guides sit under the table, not beside it. The designed life of the address is two hours. When that window ends, the page mints a replacement. There is no control labeled extend, because the limit is the product.

People reach for an address like this when a form insists on email before it will show a file, open a forum, or send a one-time code, and the inbox they actually read is already crowded with mail they did not ask for. The temporary address takes the first hit. If the sender turns into a weekly pitch, the noise dies with the mailbox. That is a filter made of time, not a second identity and not a disguise. The site you paste the address into still sees the address, your network, and whatever else it already collects.

Receive-only, on purpose

Receive-only is part of the definition. The buttons are Copy, New address, Refresh, and Delete. Copy puts the address on the clipboard. New address retires the one you were looking at and draws another. Refresh rewrites the “last checked” line and does nothing else: it will not invent a sender, a subject, or a time just to make the table look alive. Delete discards the current address and replaces it. Nothing on the page opens a compose box, a reply, or a forward. If a message needed an answer from you, this would be the wrong tool. A code, a confirmation link, or a short “you are in” note is the shape of mail the inbox is meant for.

Read what you need and copy it out before the address is gone. An empty table means nothing is stored for this address yet. No sample message is inserted. The two-hour limit still applies.

What the browser keeps

The address is created in your browser. The page stores the local-part and the moment it was created in local storage so a reload does not throw it away at once, and so the two-hour clock can be checked. Lumenbox does not ask you to open an account. The pages do not load third-party fonts, analytics scripts, or ads. That is a small privacy story, not a cloak. Local storage is readable by this origin in your browser; it is not a vault against someone who already uses your computer. Clearing site data drops the saved address. Closing the tab does not, until the two hours run out or you press Delete or New address.

If you only remember one boundary, remember this: a throwaway inbox hides the mailbox you use every day from a low-stakes sender. It does not hide you, it does not send mail, and it does not last past the clock. The inbox is the working view of that idea. The FAQ answers the short operational questions. For the errand most visitors actually have in mind, read how a signup code is supposed to be caught, with the caveat that this site is not receiving mail yet.