[AdamN]

That sounds amazing! You can get a PO Box at a USPS location and then creep on everybody else's PO Box mail???

[Holmes]

They shut down the test after I pointed this out to them, but had I not they were completely unconcerned. At the time it was called "Real Mail Notification", so hopefully they have fixed the issue with this new iteration.

[zerocrates]

They don't seem to have fixed it. From their FAQ:

Is Informed Delivery® available to PO Box® customers?

USPS® is looking to expand the service to PO Box customers in the future. PO Box customers in certain Post Offices nationwide can use our existing Real Mail Notification® service to receive a text-only message without images, via email or SMS message. Check with your local Post Office for more details.

[Holmes]

Good to know. Thanks.