GAYLORD, MI — August 8, 2005 - Deerfield.com, an international provider of messaging and security software, announced today the release of Kerio MailServer 6.1, which adds Sender Policy Framework (SPF), Spam Repellent and dual anti-virus scanning to its existing arsenal of virus and spam-fighting tools. Designed primarily for small and medium-sized businesses, Kerio MailServer simplifies email, contact and group calendar management to provide improved collaboration for all types of organizations.

In the new Kerio MailServer 6.1 the underlying email security technology has been significantly improved. Kerio has added SPF, a widely adopted method of email domain authentication, to augment the already included Caller ID, a similar technology developed by Microsoft.

The new Spam Repellent feature effectively fights off both spam and viruses by inserting a delay in the SMTP handshake, which causes a virus or spam-sending zombie to give up the connection attempt.

“Our tests showed that Spam Repellent effectively cuts 60 to 70% of spam and viruses before they reach the mail server,” said Dusan Vitek, VP Marketing at Kerio Technologies Inc. “Best of all, there are no false positives because this technique does not affect legitimate email traffic.”

Kerio has also added dual anti-virus scanning so that mail administrators can use both the built-in McAfee Anti-virus and a third party anti-virus through a provided plug-in. Plug-ins are available for Symantec, Sophos, Grisoft AVG, Eset NOD 32, Computer Associates and for the newly added VisNetic Antivirus.

“Harmful content in email is a problem that affects all size organizations,” said Dusan Vitek. “The smaller guys don’t have the same resources that enterprises do for fighting it. Even the smallest businesses and schools deserve virus and spam-free email and collaboration to help them communicate more efficiently.”

With its SME focus, Kerio MailServer is the mail server of choice for many smaller organizations looking to use a secure alternative to the other groupware offerings on Windows. Kerio MailServer 6.1 reinforces its commitment to Mac OS X users with support for Tiger and the addition of synchronization with Apple’s Address Book and iCal applications and improved integration with Microsoft’s Entourage groupware client.

"Kerio MailServer 6.1 provides sophisticated email, calendaring and security capabilities for small and mid-sized enterprises, including spam-blocking tools that can dramatically reduce the load on email servers, all at a very low price point," said Michael Osterman, president of Osterman Research. "Kerio's system offers a sophisticated and very attractive alternative for smaller organizations."

Pricing and Availability

IMbrella solutions offered by Deerfield.com start at $100.00 US and license options allow organizations to incrementally add as few or as many features as they need.

Learn more at: http://www.deerfield.com/products/secure-instant-messaging/

About Kerio Technologies, Inc.:

Innovating in Internet security since 1997, Kerio Technologies Inc. (www.kerio.com) provides Internet messaging and firewall software solutions for small to medium sized networks, emphasizing the secure delivery of network data. Kerio’s corporate headquarters are located in Santa Clara, California, with offices in Great Britain and the Czech Republic. Kerio’s technology partners include McAfee, Inc. and Internet Security Systems. Kerio MailServer, Kerio WinRoute Firewall and Kerio ServerFirewall can all be purchased globally using the Internet and a network of more than 200 resellers.

About Deerfield.com:

Founded in 1994 and headquartered in Gaylord, Michigan, Deerfield.com® is an International provider of Internet software and services designed to meet the connectivity, security and messaging needs of small-to-medium sized businesses and organizations. Deerfield.com publishes a leading suite of Internet products distributed via ESD (Electronic Software Distribution) globally through both direct and multi-tiered distribution channels. Deerfield.com continues to bring its vision of the Internet to its customers through a range of products including WinRoute Firewall, a flagship Internet sharing solution; DNS2Go®, the company’s dynamic DNS service; Shavlik HFNetChkPro, patch management software; and a newly commissioned family of products, appropriately named VisNetic®.