Mailtraq is a complete email server with SMTP IMAP POP3 Webmail and LDAP server that runs on ordinary Windows systems. Mailtraq provides Calendar and Contact sharing for User collaboration.
Visendo popConnect 2007 extends your Exchange Server. It pulls the mails from your POP3-, SPOP3, IMAP4- or SIMAP- Accounts on the web and forwards them to your internal mail server (Exchange).