http://eval.symantec.com/mktginfo/enterprise/fact_sheets/b-symc_brightmail_gateway_DS_20012004-1.en-us.pdf
http://www.symantec.com/business/brightmail-gateway
The manuals are on the internet
ftp://ftp.entsupport.symantec.com/pub/support/documentation/sbg_administration_guide.pdf
ftp://ftp.entsupport.symantec.com/pub/support/documentation/sbg_administration_guide.pdf