The ExInbox is a simple-to-use POP3 client library that allows mail readers to connect to many POP servers and manage email. It implements the client side of RFC 1939. The ExInbox is a free implementation of POP3 protocol for Win32 platforms ( the retail version is free ). 

Tired of spam? Get ride of spam, by using the exInbox component that's free. It gets you the ability to read/filter e-mails before loading them in Outlook Express or in your favorite e-mail client. More than that, even if you get some virus by e-mail, you can delete the message without any problem, because there is no code executed on your machine. All the messages are treated as simple text message, that's the best way to avoid of get infected. Unfortunately, we are not focused on fighting about spam, but we are using the exInbox component before reading any new message. We are 100% sure that exInbox component gives you a start to remove the unsolicited e-mails you get every day. If you think that you have improvements for any of the samples that are installed in the sample folder, please do them and send them to us, so we can update the setup so everybody can benefit.

The exInbox binary version is 100% free.