Vote for Native POP3 Connector
Native POP3 Connector offers a standard solution for the problem with receiving mail through the POP3 protocol for Microsoft Exchange Server
2000/2003 and Microsoft Small Business Server 2000/2003 with Microsoft Exchange Server installed.
Key product features: Exchange System Manager and Active Directory full integration; All types of Microsoft Exchange Server recipients supported; Support of a large number of mailboxes; Multi-user (global, catch-all) mailboxes supported; Multithreaded processing; Convenient audit system using Event Viewer and log files; Secure Socket Layer (SSL) connections support; Flexible mailboxes processing scheduler; Automatic and manual modes for the message recipients' resolving; A set of advanced options for a highly-optimized message receiving process