What Should You Do With an Unexpected Device-Link Request?
Refuse a request you did not initiate and keep control of the active inbox.
What to do now
If a device-link request appears and you did not start it, refuse it. Do not approve just to see what happens.
Unexpected means untrusted
The approval prompt is specifically there so an unsolicited scan does not become silent access. A request you did not initiate has no reason to be accepted.
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.
There is no useful reason to approve an unsolicited request
An unexpected prompt is exactly the case the approval boundary is meant to stop. Refusing it costs you nothing; approving it could give another device the same temporary inbox view you currently have.
The practical takeaway
No initiated scan, no approval. Refuse unexpected requests and keep the active inbox under your control.
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.
Create temporary emailRelated device linking guides
Continue with the device-linking topics closest to what you just read.
How to Open the Same Temporary Inbox on Another Device
Continue with the inbox already receiving your messages instead of creating a second address.
Read guideHow 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 guide