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 Small Business Server 2000/2003. NPC is a standard solution for MS Exchange Server: Connector.
pop3 connector pop3 downloader exchange gateway exchange connector exchange extensions

IT Monitor 

IT Monitor is the leading solution for monitoring every aspect of your LAN and WAN network. It proactively manages your network servers, printers, network devices, databases and applications.
application monitoring disk drives cpu usage disk spaces ftp sites http icmp/ping ms sql nntp ntds ntp odbc pop3 printers