OstroSoft POP3 Component   
http://www.ostrosoft.com

COM library for Visual Basic 6, providing functionality to retrieve emails from mailserver (POP3).

POP3 preview LITE   
http://www.pool-magic.net

Check of messages on the POP3 server with ability to delete message from the server, without urgency to download it. Next, you can safely download attachments so it doesn't try to run any from them. It is possible to apply simple Spam filter.

POP3 Wizard ActiveX   
http://www.seekfordsolutions.com

POP3 Wizard +SSL allows you to be able to access a POP3 server and download messages with minimal knowledge of how POP3 works and very little code. There are many features for simplifying tasks of accessing an POP3 server. You get complete control over the mailbox account. POP3 Wizard +SSL allows you to: Be used in a scriptable language such as VBScript Get Drop Listings Find out how many messages are there without downloading anything Use Secure Password Authentication for logins Get Scan listings Get Full messages or just the headers Get the Unique Identifiers for messages Delete messages Use every command that POP3 protocol supports. Secure Socket Layer(SSL) Channel Encryption Supported Plus added features for parsing headers of messages. HTML, PlainText Body parsing Save attachments and messages to disk NEW - Support for SOCKSv4 and SOCKSv5,aka SOCKS4 and SOCKS5, FireWall proxies. The Post Office Protocol v3 Wizard allows for a great deal of control over your messages. You can download messages and quickly access the key features of them you want, like grabbing those file attachments. This component makes it easy for you write a program that incorporates watching a mail drop for specific information, receive sent files and data, and much more. This control works with any ActiveX container and even works in ActiveX scriptable languages such as VBScript.

Tech-Pro POP3 Pal   
http://www.tech-pro.net

POP3 Pal is a mail client for people on the move. It provides an easy way to access your POP3 mail from any Windows-based PC. It can also be used for mailbox maintenance - for example, to delete an unwanted large message that is blocking access to your other email. POP3 Pal lets you read and reply to mail directly from your POP3 server. It supports unlimited accounts or profiles, so you can check your mail on any number of POP3 mailboxes. A "Check All" option lets you see at a glance which of your accounts have waiting messages. The optional spam check shows you messages that are likely to be spam. You can delete all the messages marked as spam with a couple of mouse clicks. POP3 Pal Message Composer lets you reply to messages and send new mail using an available SMTP relay host. Copies can be sent to your POP3 server so that you retain the complete "thread" of correspondence when you download the messages into your usual mail client back home.. POP3 Pal has many special features that are rare or unique in this class of software: supports HTML formatting (for received and sent mail); supports attachments, including inline images; spam checking option; integrated address book; supports POP3 APOP and SMTP authentication; all settings stored on a portable .INI file; small enough to fit on a floppy. You can try POP3 Pal free of charge. In evaluation mode its use is restricted to a single POP3 account (profile) and every message you create carries a small advertisement. Registration provides unlimited accounts and removes the advertisement.

TM-POP3 Server   
http://www.tmsoft.com

POP3 Server for Windows delivers e-mail fast and fully integrates with Microsoft SMTP server for Windows NT/2000/XP. Supports multiple user mailboxes, multiple domains, remote administration, logging, and security controls. Admin account supports remote configuration and e-mail auditing for monitoring or archiving all received mail. Includes security access controls to limit connections from only certain IP addresses. Runs as a Windows service which can be configured to run at system boot. Installation and configuration couldn't be easier with the automated installer and administration tool. The server and administration tool are designed to not require any additional system DLL's, which means the server will never conflict with other software! The TmPop3 server, TmPop3 Administration tool, and help documentation are included in the installation download. TM-POP3 Server is stable, fast, and efficient.