Significant Additions Enable Clients to Manage Compliance Policies Centrally, Improve Security, Simplify Messaging Infrastructure, Reduce Costs and Increase Productivity

Postini, a global leader in on-demand communications security and compliance solutions for email, instant messaging and the web, today detailed major new innovations and enhancements to its family of Software as a Service solutions. Postini also announced expanded geographic coverage. Postini's solutions are designed to protect businesses worldwide from threats to their electronic communications, enforce business policies, secure intellectual property, assure privacy, and enable compliance with legal and industry requirements for the retention and discovery of email and IM data.

"Postini's email security service just works," said John Grofik, technical infrastructure supervisor at Four Seasons Solar Products in Holbrook, NY. "In addition, when we had some persistent network errors and bandwidth use issues at one of our six retail locations, we activated Postini Web Security and the problems went away immediately."

"With the service enhancements that we are announcing today, Postini is improving on what were already highly effective and advanced on-demand solutions for communications security and compliance," said Scott Petry, founder, chief technology officer and executive vice president of product development at Postini. "Postini's new solutions raise the bar even further by delivering an expanded suite of tools that allow IT to define policies for security, encryption, supervision, retention and discovery across multiple protocols from a common services infrastructure. Postini's services can deliver higher value, more quickly than traditional forms of on-premise software or hardware deployments." New innovations ensure multi-channel communications are secure and productive

Postini Email Security is designed to protect businesses from spam, viruses, phishing, fraud and other attacks to ensure the security, productivity and reliability of electronic mail. Postini has enhanced its security offerings to protect clients from the increasing threats to their electronic communications. New innovations include:

• Adaptive heuristics -- Postini has enhanced its adaptive heuristic framework with rapid filter updates and new algorithms that block emerging sophisticated zero hour spam, virus outbreaks, and image spam attacks. The result is an enhanced level of security and performance for Postini's clients.
  
• Improved PTIN intelligence -- The Postini Threat Identification Network (PTIN) is a real-time collection of malicious and infected IP addresses that propagate spam, viruses, phishing, and other attacks across the internet. PTIN data is based on the collective data observed by Postini across the billions of connections processed daily across Postini's global data centers. PTIN has been further enhanced to provide state of the art protection against distributed bot-net attacks.
• Compressed file scanning -- Malicious executables and other forms of viruses are often hidden inside of compressed or archived attachments in order to evade detection. Building on the recursive unpacking capabilities within the anti-virus scanning, new attachment scanning capabilities automatically open and inspect compressed and archived files, including multi-layered attachments to identify executable code by binary type, regardless of threat profile. This allows businesses to define polices to regulate inbound and outbound data flow throughout multiple layers of detection.

Combined with Postini's security architecture, which is designed to ensure the most effective protection, these new innovations to Postini Email Security strengthen the value delivered to clients by maximizing catch rates of unwanted communications and minimizing false positives. Postini Web Security provides HTTP real-time data scanning to protect
businesses from viruses, spyware, adware and phishing attacks and web filtering to create, enforce, and monitor web usage policies. Postini Web Compliance dynamically enforces acceptable use policies regarding web usage, minimizing compliance violations and sensitive data loss.

"Postini gives me the peace of mind that users can't create problems by clicking on web links and installing something they shouldn't," said Brian McPartland, IT manager of the Washington Capitals hockey organization. "Thanks to Postini, I can focus on other business issues. People wonder how I am able to run the IT department by myself for an organization of our size. Postini takes the pressure off of me and gives me time I can utilize
elsewhere."

New innovations and enhancements to Postini Web Security and Postini Web Compliance include:

• Pre scanned search results -- New innovation provides an "early warning system" for search results from popular search engines including Google, Yahoo! and MSN. This keeps users from clicking on search results linking to sites that contain malware. This increases both security and productivity by delivering "visual cues" to users, alerting them of malicious sites and reducing infections and outages.
• Network effect for URL scanning -- Enhancements to web scanning ensure threat data is learned and shared across all users in order to improve security posture, improve operational integrity, and reduce load on IT staff. This new self-learning system continuously monitors web activity and adapts to threats in real-time.
• Mobile and remote user support -- With remote, mobile and home-based user bases growing, new enhancements to Postini's web security solution enable customers to ensure access and usage policies are enforced regardless of the location from which users access the web and protect the corporate systems.
• Intelligent web protection -- New intelligent web protection filters out portions of web sites that contain malware or malicious links while providing access to the safe parts of the site. This provides much finer control than more blunt instruments that block entire sites or domains so business users can continue to access to sites they need while staying protected from web based threats.
• Management reporting -- New management reporting capabilities provide detailed visibility into employee usage of the web, blocked sites, and blocked content. The reports can be scheduled on a pre-defined schedule and accessed in multiple formats.

About Postini
Postini is a global leader in on-demand communications security, compliance, and productivity solutions for email, instant messaging and the web. Postini's award-winning services are designed to protect customers from viruses, spam, phishing, fraud, and other attacks; encrypt messages to ensure confidentiality and privacy; and archive communications to ensure compliance with regulations and to prepare for e-discovery. More than 36,000 businesses rely on Postini everyday to protect them from a wide range of threats, ensure reliable communications, reduce compliance and legal risks, and enable the intelligent management and enforcement of enterprise policies to protect intellectual property, reputations, and business relationships. More than 1700 business partners worldwide add value to Postini solutions.

Contact
info@postini.com
www.postini.com.