eWall requires Microsoft Windows XP, 2003, Vista, 2008, or Windows 7. Windows Server editions are highly recommended. Control Panel requires minimum of Internet Explorer 6, although newer browsers are recommended. eWall will install fine on 64-bit operating systems, however will work as a 32-bit application.
RAM, CPU and disk space requirements depend on actual conditions and, primarily, on the amount of daily emails being processed by your mail system. The more mailboxes you have, the higher requirements. For example, for 5 mailboxes and 1,500 daily emails 512 RAM and 1 GHz CPU should be enough. For larger mail systems, processing 150,000 emails daily, we recommended at least 2 GB of RAM, 2.4+ GHz CPU and 4 GB of free disk space.
Also, we recommended you install eWall on a separate machine. It will reduce the load of your mail server around 90% and provide better performance for your end users, retreiving POP3 and IMAP email faster, while eWall takes care of SMTP.