Free symantec mail security for exchange software for windows

Microsoft Antigen server security products help businesses protect their e-mail and collaboration servers from viruses, worms, spam, and inappropriate content.
Many of todays viruses and worms are designed by criminal hackers to rapidly infect millions of computer systems across the world through the Web and e-mail. In addition to e-mail threats, an evolving ecosystem of viruses, worms, and blended threats are finding new ways to propagate inside corporate networks--including via portals and instant messaging applications. As a result, messaging and collaboration infrastructure is a critical focal point for businesses in the fight against malicious software.
Antigen server security products provide comprehensive protection for e-mail and collaboration environments with:
? Advanced Protection: Multiple scan engines at multiple layers throughout the e-mail infrastructure provide improved protection against e-mail threats.
? Availability and Control: Tight integration with Microsoft Exchange and Windows-based SMTP servers maximizes availability and management control.
? Secure Content: Helps organizations eliminate inappropriate language and dangerous attachments from internal and external communications.
To prevent infection and improve spam detection, Antigen e-mail security products combine the strengths of multiple, industry-leading technologies to uncover the latest e-mail threats and spammer tactics. The Antigen e-mail server security products provide complete server-level protection and will help you easily protect your e-mail infrastructure at multiple points in the network to prevent productivity loss and downtime.
Microsoft Antigen for Exchange, a server-based antivirus solution that provides comprehensive protection across Exchange 2003 and Exchange 2000 environments. It can be deployed on front-end and back-end Exchange servers, protecting against perimeter threats as well as providing internal incident containment. Inbound and outbound scanning is performed at the SMTP stack and real-time scanning at the Exchange Information Store.
As of December 2006, customers who purchase Microsoft Forefront Security for Exchange Server to protect Microsoft Exchange Server 2007 will also be licensed to use Antigen for Exchange, Antigen for SMTP Gateways, and Antigen Spam Manager to protect their Exchange Server 2000 and Exchange Server 2003 environments.
System requirements:
Processor
? PC with a 166-MHz or higher Intel processor
Memory
? 512 MB of available memory or more is recommended
Hard Disk
? 100 MB of available disk space
Microsoft Exchange
? Exchange Server 2003 or Exchange Server 2000 -- supports Microsoft Exchange running on Microsoft Cluster Servers
Additional Requirements
? Internet Information Services (IIS) 4.0 must be installed
? If using Exchange Server 2000, Microsoft Data Access Components (MDAC) 2.7 and Jet 4.0 SP3 must be installed

Version restrictions:
- 30 days trial

This vulnerability exists because IIS 5.0 and Exchange 2000 incorrectly handle URLs that have a specific construction. If a malicious user sends a request to an affected Exchange 2000 server or an affected IIS 5.0 computer using a malformed URL, it can result in a repeating memory allocation error that causes IIS 5.0 to fail. Any Web sessions in progress are lost.