Free pop3 server program software for windows

Baby POP3 Server - Simple POP3 server, which doesn?t take many resources and supports most of the standard POP3 commands Baby POP3 Server is a simple POP3 server, which doesn?t need many resources and supports most of the standard POP3 commands.
POP3 Server classes:
- CListenSocket
This socket accepts all incoming connections. When a client connects to the server, CListenSocket accepts the connection and creates a new thread (CClientThread) that will take care of all further communication between the client and the server. After the thread has been created, CListenSocket will return to its waiting state.
- CClientThread
This thread will handle all communication between the client and the server using CControlSocket.
- CControlSocket
This socket class will process all incoming POP3 commands and send back the response to the client. CControlSocket is basically the class where all the good stuff is happening:
Validate user login
Read mail directory and keep track of changes (deleting mail).
When requested, send messages to the client.
- CMonitorThread
This thread monitors the mail drop folder for incoming messages (from the SMTP server). When a new message is dropped into this folder, its header will be checked to determine the receiver. If this receiver has a user account on our server the messages will be copied to his/her mailbox. If the server cant determine the receiver, the messages will be moved to the admin mailbox.
CMonitorThread uses FindFirstChangeNotification to find out if there are any new messages in the mail drop folder. Unfortunately ReadDirectoryChangesW is not available under all versions of Windows(this function tells us exactly what has changed in the specified directory) , so I had to reproduce its functionality by keeping track of the changes myself.
- Configuration:
To make this POP3 server useful you must also have a SMTP server installed. Microsofts SMTP server from ISS will be fine (included with Windows NT/2000/XP). Usually this SMTP will have a mail drop folder were it will drop incoming messages. Microsofts SMTP server uses c:inetpubmailrootdrop by default.
This mail drop folder is the input folder for our POP3 server, so open the Settings dialog and set the mail folder.
The time-out setting lets you specify the time-out value for receiving data. When clients become idle for too long the connection will be closed.
In User Accounts you can Add/Edit and Delete user accounts. The admin account is default and cant be removed.
- TODO:
Implement any missing commands.
Add mailbox locking (so multiple users cant log into the same mailbox).
Add domain checking.
Make lots of money by selling this software instead of giving it away for free...
Features:
- Supports most RFC1939 POP3 commands
- Supports multiple POP3 user accounts
- Integration with Microsoft SMTP server
- Multi threaded
Enhancements:
- Fixed: Timing problem while monitoring Drop folder.

Searches for SMTP Servers with Relay Facility SMTP Server Search is a simple application designed to search for SMTP Servers with Relay Facility.

A freeware and easy to use POP3/SMTP mail server for Windows Mail Server implements most common SMTP/POP3 features and the emphasis in this application is to write a server that is exceptionally easy to use and configure.
The server should work on Win95+ and WinNT 4+ on low-powered machines. Mail Server is not big and bloated, but small and simple.
In some respects Mail Server is too simple, but it is stable and compact, and works well on small/midsize installations, as an alternative to proprietary mail systems.

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A C# port of the Java Email Server which is an established email server targeted at small centrally maintained installations CSES is a project to provide the same feature set to the .NET platform. However, in addition to the features of JES, CSES provides individual reusable components that other applications can use to provide email functionality.
The current release of CSES provides the SMTP Server component. This component allows a program to accept incoming emails and process them using user defined logic.
The current release of CSES does not implement a full POP3/SMTP email server. However, these features are expected to be provided in upcoming releases.

Home Mail Server is a POP3/SMTP server which should have the same kind of functionality as Home Ftp Server or Home Web Server. Home Mail Server is a POP3/SMTP server which completes the home server software line and which should have the same kind of functionality as Home Ftp Server or Home Web Server.
There are a lot of features not completed and as soon as ive finished fixing the remaining issues it will be upgraded to final.