AppRiver Joins Forces with Email Security Technology Visionary Peter McNeil; Companies to Co-Own Message Sniffer(TM) Spam Detection Engine.

GULF BREEZE, Fla. -- AppRiver LLC, a leading provider of business email security solutions, today announced an agreement with Sterling, Va.-based MicroNeil Research Corporation, for joint ownership of MicroNeil's powerful Message Sniffer(TM) spam detection engine. The partnership will enable AppRiver and MicroNeil together to devote additional resources to Message Sniffer technology enhancements while making the software more widely available for integration in third-party products, services and applications.

Created by artificial intelligence and robotics research innovator Peter McNeil, Message Sniffer uses advanced pattern recognition technology and a regularly updated "rules" database to accurately identify spam. Deployed since 2002 in AppRiver's complete outsourced email protection service, the technology currently is used in email security systems protecting 20,000 businesses and institutions worldwide.

Unlike many anti-spam products that scan for content, Message Sniffer's sophisticated tests search for combinations of spam features including message sources, common obfuscation techniques, email and URL targets and fragments, and even coding styles. Because its database of "rules" is updated continuously in response to the latest spam attacks, Message Sniffer is able to achieve more than 98% effectiveness in blocking unwanted email messages.

"Message Sniffer was built on the premise that spammers will continue to develop more and more sophisticated delivery schemes to distribute their messages," said Peter McNeil, who has more than 20 years experience in research on computer learning, fuzzy logic systems, neural networks and pattern recognition. "Our new agreement with AppRiver will ensure the ability to maintain our edge in this battle by accelerating enhancements to the technology. AppRiver will provide financial, technical and business resources that will be used for R&D to drive the technology forward more rapidly."

Message Sniffer runs efficiently on all major operating systems including Windows, Linux, BSD, and commercial flavors of Unix; it easily integrates with most email server or spam filtering platforms. The filter is effective immediately, no training period is required, and maintenance requirements are extremely low. Frequent updates are usually downloaded automatically when triggered by update notification messages or on a scheduled basis by user-side utilities.

"We began researching pattern matching engines four years ago and determined that Message Sniffer was the best available solution," said Joel Smith, CTO of AppRiver. "This agreement will give us additional defenses against spammers by expanding the Message Sniffer user base and thereby enabling us to increase the effectiveness of the rules. At the same time, it opens up opportunities for unique implementation improvements in our hosted environment."

"By bringing Message Sniffer in-house, we add another component to our product and service offerings while maintaining a level of competitive advantage in the email security marketplace," said Michael Murdoch, CEO of AppRiver. "Until now, we have been primarily focused on managed email security with our SecureTide(TM) service. Our new relationship with MicroNeil allows us to offer a spam and virus solution to clients who feel more comfortable using a system that integrates directly into their email platforms."

Message Sniffer is designed for easy integration into a broad range of existing environments and products and is available to equipment manufacturers, VARs, ISPs, educational institutions and corporate IT departments. Complete technical and sales information about Message Sniffer including a trial version of the software in 1Q 2006 is available at http://www.appriver.com.

AppRiver, LLC is a privately held managed service provider, specializing in the elimination of spam and viruses for 5,000 clients worldwide. Founded in 2002, AppRiver is headquartered in Gulf Breeze, Florida.