nPOP is a Portable and Free Email Client created by Nakashima Tomoaki. This tiny Free Email Software program allows you to send and receive Email while on the go. nPOP stores your Mail setup, address book and messages back to your flash drive. nPOP can also be used to manage and synchronize the inbox on your server. For example, you can delete mail from the Email Server directly through nPOP. Other features include auto checking email at user selectable intervals, multiple account setup and spam filtering.