Editors' Note: When installing Plus and Pro versions on Windows NT, 2000, or XP, you will have a choice to install either Windows 95/98/Me, or Windows NT/2000/XP versions. NT/2000/XP is pure service application. It will run only on Windows NT 4.XX, Windows 2000 and Windows XP (either home or pro). As of Win95/98/Me version, it will run on Win95, 98, Me, NT, 2000, XP as a regular application, on a tray icon, but you will be unable to use it as a windows service application.
Powerful and simple SMTP/POP3/Finger/IMAP server, with built-in Web interface for accessing mail via Web browser. Supports security features, such as SMTP authentication, trusted, and banned IP addresses, basic filters, 3rd party server extensions, DNSBL, SPF, White/GrayListing. Has built-in TZO client for users without static IP address.