POPcon
POPcon connects MS Exchange Server(tm) to POP3 and IMAP mailboxes. It acts as an e-mail collector that retrieves messages from POP3 mailboxes and delivers them to your Microsoft Exchange Server mailboxes according to the intended user found in the mails. ... * Can be installed on same machine as MS Exchange Server(TM) - uses only one internet connection and one POP3 mailbox to receive mail for the whole workgroup or company. ... * Polls multiple POP3 and IMAP mailboxes and distributes mail to your MS Exchange(TM) mail server.
http://www.christensen-software.com/popcon/ipopcon.exe - 6Mb - Download - Screenshot

Native POP3 Connector
It is widely known that Microsoft Exchange Server 2000/2003 doesn't support receiving mail through the POP3 protocol. However, in practice, it has been shown that many users find the absence of this feature inconvenient. All the existing solutions entice users to use a utility agent receiving... Native POP3 Connector (NPC) offers a standard solution for the problem with receiving mail through the POP3 protocol for Microsoft Exchange Server 2000/2003 and Small Business Server 2000/2003. ... NPC features the following advantages and capabilities: integration with Microsoft Exchange Server...
http://www.mapilab.com/files/pop3_connector.zip - 2Mb - Download - Screenshot

1st Mail Server
1st Mail Server is a fast and secure Professional SMTP/POP3 server program. You can use this program in many environments ranging from a corporate mail server to a standalone SMTP relay for your laptop. Any standard mail client can be used to send email using this server. ... You can have multiple SMTP gateways in your server if you travel a lot with your laptop. ... SMTP and POP3 servers work as NT services therefore they will keep working in the logoff mode. ... This way, even if you cannot deliver your email directly to the destination, you will be able to still send it using one of the...
http://www.softstack.com/download/firstmailsrv.zip - 3Mb - Download - Screenshot

POP3 preview LITE
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.
http://www.pool-magic.net/files/pop3prew_setup.exe - 715Kb - Download - Screenshot

A1Monitor Network Monitor TCP or Web
Monitor multiple web or TCP servers (http, https, ftp, pop3 etc. ) Receive email notification by email or pager if any can't server can't be reached a number of times in a row. A1Monitor can reboot your NT server or run a batch file or program for you. ... ) Support for http proxy server for http and https monitoring. ... Reboot a local or remote computer when server failures occur. ... exe when server failures occur. ... Server response time graphs. ... Supports http, https, ping, ftp, telnet, pop3, smtp, dns, imap, dns, or any other TCP port you want.
http://files.a1tech.com/files/a1monitor.exe - 3Mb - Download - Screenshot

Best Mail Server
Best Mail Server is an ultra fast mail server program. You can send mail from any mail client that is complaint with SMTP protocol using this server. You can also configure it to be your local mail server. It will accept mail on behalf of your users and store it, until your users will retrieve... A lot of security features and options that allow you to protect the server from DDoS attacks as well as safely block SPAM and spammers are built into the server. ... SMTP and POP3 servers work as NT services therefore they will keep working in the logoff mode.
http://www.softheap.com/download/bestmailsrv.zip - 3Mb - Download - Screenshot

Mail Server Pro
Mail Server Pro is a bullet-proof SMTP POP3 server software used by corporations and Internet Service Providers as an ultra fast and reliable mail server. It is simple but powerful; it has a lot of security features and options to prevent DDoS attacks and block SPAM. ... Using Mail Server Pro, you will never encounter a sending problem wherever you connect your PC to a network or phone socket. ... The SMTP and POP3 services work as NT services therefore they will keep working in the logoff mode.
http://www.getfreefile.com/download/mlsrvpro.zip - 2Mb - Download - Screenshot

Enterprise Mail Server
Enterprise Mail Server is a high-performance SMTP POP3 server program designed for large enterprises and Internet Service Providers where having an ultra fast and reliable mail server is vital. It can be used along with virtually any mailer or email program; it is simple, light-weight, powerful... After you enable the testing mode, the server will accept your email messages, store them in the queue but will not deliver them to the actual recipients. ... Using Enterprise Mail Server, you will never encounter a sending problem wherever you connect your PC to a network or phone socket.
http://www.emailarms.com/downloads/zip/entersmtp.zip - 2Mb - Download - Screenshot

HS POP3 Lite
HS POP3 Lite is a software library in C (supplied with full source code) which implements the client side of Post Office Protocol Version 3 (POP3) over TCP socket layer according to RFC 1939. Among other features, the library supports user authentication, reception of basic internet headers and... To receive email messages from any POP3 RFC1939 compliant server, the user application calls HsPop3GetMail function, specifying mail server name or IP address and login user name and password. ... HS POP3 Library incorporates the necessary state machine, transparency procedures, and server...
http://www.hillstone-software.com/hs_pop3_demo.exe - 80Kb - Download - Screenshot

POPcon PRO
POPcon PRO connects MS Exchange Server(tm) to POP3 and IMAP mailboxes. It acts as an e-mail collector that retrieves messages from POP3 mailboxes and delivers them to your Microsoft Exchange Server mailboxes according to the intended user found in the mails. ... * Polls multiple POP3 and IMAP mailboxes and distributes mail to your MS Exchange(TM) mail server. ... POPcon offers the following features: * Poll private POP3 and IMAP mailboxes and forward mail to a single MS Exchange(TM) mailbox or distribute mail from multi-drop POP3 mailboxes to multiple MS Exchange(TM) users according to...
http://www.christensen-software.com/popconpro/ipopcon.exe - 5Mb - Download - Screenshot