How does storage work?

Each envelope/postcard/magazine you receive has a 30-day period of free storage, and each package has a 7-day period of free storage from the date it is uploaded to your virtual mailbox.
After your item/package exceeds its free storage period, there is a fee of $0.05 per mail item per day or $0.10 per pound per day for packages.
All mail is subject to storage fees until you pick it up or request it to be shipped or recycled.