Title: Providing E-Mail Defense in Depth for Microsoft Exchange with the ISA 2004 Firewall SMTP Message Screener Author: Thomas Shinder Summary: There?s no doubt that spam is public enemy number one, not only to the e-mail administrator, but also to the firewall admin. Spam clogs Internet connections, wastes corporate bandwidth, reduces employee productivity and consumes valuable Exchange Server software and hardware resources. Spam, together with its evil cousins e-mail worms and viruses, represent the primary threats against corporate networks today. Find out how the ISA 2004 firewall protects your Exchange Server by acting as the first line of defense against spam and viruses. Link: http://www.MSExchange.org/pages/article.asp?id=632