Symantec Brightmail requirements are as follows:
Windows®
• Microsoft Windows 2000 Server or Windows Server™ 2003
• Intel® Pentium® 4 processor or higher
• 1024 MB RAM minimum
• 250 MB available space
Solaris™
• Sun™ Solaris 9 or 10
• UltraSparc processor
• 1024 MB RAM minimum
• 250 MB available space
Linux
• Red Hat Linux ES/AS 3.0 or 4.0
• Intel Pentium 4 processor or higher
• 1024 MB RAM minimum
• 250 MB available space