Free pop3 server 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.
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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.

ArGoSoft Mail Server is fully functionalSTMP/POP3/Finger server for Windows 95/98/NT, whichwill let you turn your computer into the email system.

Popp - a POP3 email client that supports password encryption and proxy server Popp is a simple and free POP3 email client with some very useful features.
Main features:
- Multiple email accounts (passwords are encrypted when saved).
- Allows easy and quick deletion of multiple emails ? delete huge emails that are clogging your mail account, or remotely delete all your junk email, for example.
- Quick preview a message sitting in a remote POP3 server.
- Proxy Server Support.
- If you?ve deleted multiple messages, you have the option of undoing your changes before you disconnect.
System requirements:
- This application requires the .NET Framework 1.1

PopMan is a POP3 manager and notifier PopMan is a POP3 manager and notifier. You can use it to list all e-mails received on your incoming mail server (POP3 server), without having to load these mails completely.
Unwanted e-mails can be deleted directly from the server. You can use it to check your e-mail accounts in the background. The number of waiting messages is displayed on the tray icon for each account.To show you whether e-mails contain useful information, or whether they are just spam, it provides a preview function.
You can use this preview pane to read the text-based content of your e-mails - whether they are plain text or HTML. In contrast to most e-mail programs, reading mail with PopMan is absolutely secure.
There is no threat of executing dangerous code or being infected with viruses. You can direct it to use local storage (settings are saved to an *.ini file), and save it to a floppy disk or USB memory stick. This means you can check your mail on any computer with internet access.
Main features:
- List e-mails waiting on your server
See the e-mails waiting on your incoming mail server and decide whether you want to download them to your computer.
- Delete unwanted e-mails
Unwanted e-mails (mass mailing and other spam) can be deleted directly from the server, without having to download them at first.
- Check e-mail accounts in the background
You can have PopMan run in the background and check your accounts at regular intervals. When new mail arrives, you will be notified immediately.
- Secure viewing of e-mail messages
You can examine the content of your e-mails without the danger of potential viruses, ActiveX controls, or JavaScript code. HTML-formatted messages are not interpreted or executed - PopMan simply extracts and displays the text with information.
- Selective downloading of e-mails
You can download any e-mail you choose without depending upon other e-mail clients.