Post Office 2.0 - Post Office allows you to maintain, and switch between sets of NewtonMail locations and access numbers. It came about because I do a lot of commuting and I got tired of manually changing the NewtonMail phone number every morning and switching it back when I got home. To Run Post Office - Install on your MessagePad in the normal way (NCK, NTK, Package Downloader, etc.) Open Extras drawer. Tap on the Post Office icon. Read the online help for detailed use information. Post Office is a Newton app developed using Steve Weyer's Newt development environment (ver 3.0).