How to Open the Same Temporary Inbox on Another Device
Continue with the inbox already receiving your messages instead of creating a second address.
Quick answer
Open the link option on the active inbox, scan the rotating QR code with the second device, then approve that request in the browser that already controls the inbox.
Join the existing inbox instead of creating another one
The second device should arrive in the same active message context only after approval. That keeps the verification flow continuous when you move from desktop to phone or back again.
Device linking keeps the task inside one active MailOnce inbox. The QR code is only a short request mechanism; access still depends on approval from the browser that already controls the inbox.
The handoff should feel like a continuation
Once the request is approved, the practical test is simple: both screens should be looking at the same temporary inbox and the same incoming messages. If the task has moved to another device, you should not need to create a replacement address just to keep going.
The practical takeaway
Scan to request, approve to enter. The goal is continuity with the same inbox, not a second temporary address.
Try MailOnce
Move one active inbox between your own devices
Create a temporary inbox, then link another device only when your task genuinely moves from one screen to another.
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How QR Device Linking Works in MailOnce
Follow the request from rotating QR code to browser approval and access on the second device.
Read guideWhy Does MailOnce Require Approval After Scanning the QR Code?
Understand why a scan starts a request but the existing session still controls permission.
Read guideIs QR Device Linking Safe?
See the security boundary of short-lived QR requests, explicit approval and recognized devices.
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