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Supported platforms:
Windows Vista, Windows XP (32 and 64-bit editions), Windows 2003 Server (32 and 64-bit editions), Windows 2000 (SP3 and above).

Supported email clients for antispam:
Microsoft Outlook Express, Microsoft Outlook 2000, 2002, 2003 and 2007.

Supported email protocols & services:
POP3, SMTP, IMAP.

Hardware:
450 MHz or faster CPU(x-86/x-64/multi-core), 256Mb RAM, 100MB free disk space.