If you want to dial in to a VPOP3 server, then normally you will need to be running an NT based Operating system (Windows NT, 2000, XP or 2003) in order to be able to use a Dial-In Server which supports TCP/IP.
Because of this limitation, VPOP3 has a feature called 'VPOP3 File Transfer' for sending and receiving email messages. This method works by transferring files, so it works with any network protocol which supports file sharing - eg NetBEUI (Microsoft Networking) or IPX/SPX (Novell Networks).
With this method, both the server and the remote PC need to be running VPOP3.
The server needs to share the VPOP3 directory and all sub-directories so that the PC which is connecting over the dial-up connection can:
Create, Delete, Read & Write files in the VPOP3 directory
Create, Write & Delete files in the VPOP3\OutQueue directory
Create, Read & Delete files in the VPOP3\<user> directory (or directories), where <user> is the user for which the remote VPOP3 is going to retrieve messages.
Create VPOP3 users for each user and remote user (as normal).
Create a VPOP3 user for the user of this remote PC. Give this user the same name and password as the corresponding user on the server.
On the In Mail and Out Mail pages, choose 'VPOP3 File Transfer' as the method. Then in the Source Path or Target Path fields enter the UNC name of the VPOP3 directory on the server. For instance, this would be \\Server\VPOP3 if the server has shared the VPOP3 directory with the name VPOP3.
On the In Mail page, choose the user(s) you want to transfer messages from the Server to this PC.
On the Utilities -> Misc Settings -> Basic Tweaks page, you will generally want to turn on Don't Route Local Mail Locally so that all outgoing mail is sent to the Server VPOP3.