Press Release

Kayak.com chooses Port25 Solutions Inc. for faster email delivery and streamlined authentication support

Ellicott City , MD, March 3, 2009 -- Port25 Solutions, Inc. the leading solution for enterprise email delivery infrastructure software with a substantial global footprint announced today that Kayak.com has selected Port25’s flagship product, PowerMTA, to help fulfill its digital messaging requirements.

PowerMTA combines inherent scalability, real-time delivery reporting including bounces and the most extensive delivery control available to make it easier for sender campaigns to reach recipient inboxes. In addition, PowerMTA enables authenticated delivery of commercial email without the costly integration or extensive customization that is normally required when using traditional open-source MTAs (message transfer agents).

Kayak.com is the world’s largest travel search site. It searches hundreds of travel sites from all over the world, providing subscribers with detailed information and directly routing them to the source for convenient purchase. Its comprehensive search provides prices and itineraries for hundreds of airlines, more than 200,000 hotels, all leading rental car brands, and 18 cruise lines. Kayak.com uses PowerMTA to distribute industry-leading Fare Alerts to over 1M users per week, which notify consumers via email when the airfare meets or beats the user’s desired price.

PowerMTA introduced the following optimizations to Kayak.com’s Fare Alert program:

• Dramatic improvement in message throughput
• Streamlined DomainKeys and DKIM-based authentication support
• More granular delivery shaping on a per domain/per message stream basis

“Given that availability and pricing can change at a moment’s notice in the travel space, it’s important that the latest information reach customer inboxes as soon as possible. PowerMTA™ not only helps Kayak.com by ensuring timely delivery of its email Fare Alerts and providing proper originating identity validation to receiving messaging gateways , but it also provides the delivery control necessary for Kayak campaigns to easily adhere to published gateway receipt specifications. This means that Kayak.com will now benefit from enhanced deliverability achieved without making any performance sacrifices.” said Russell Fletcher, VP for Port25 Solutions Inc. "We''re honored that Kayak.com has greatly enhanced its sending infrastructure with PowerMTA and has entrusted it to deliver such highly relevant email content to its subscriber base."

About Kayak.com

Kayak.com, the largest Travel 2.0 site in the world, is a global Internet media company operating Kayak.com, Sidestep.com, TravelPost.com and TravelSearch.com. Kayak.com and SideStep.com display results from more than 440 travel brands, providing prices and itineraries for hundreds of airlines, more than 200,000 hotels, all leading rental car companies and 18 cruise lines. Kayak.com has won more awards since launch than any other travel site including the 2008 Webby Awards People’s Voice Winner; “Top 25 Budget-Centric Travel Websites”, by USA Today; “25 Sites We Can''t Live Without” by TIME Magazine; “Best Search Engine” by the Associated Press; and “Best of the Web” by BusinessWeek, Forbes and US News & World Report. Launched in 2005 by co-founders of Orbitz, Travelocity and Expedia, Kayak.com’s investors include General Catalyst Partners, Sequoia Capital, Accel Partners, Norwest Venture Partners, Trident Capital, Oak Investment Partners, Lehman Brothers Venture Partners and America Online, Inc. Kayak.com has sites in the US, UK, France, Germany, Spain, Italy, India, Sweden, Norway, Denmark and Finland. For more information, visit www.Kayak.com.

About Port25 Solutions

Since 1999, Port25 Solutions has provided specialized email infrastructure software products that address the unique demands of customer communications and email marketing applications. PowerMTA, Port25's flagship product, provides senders with superior performance and advanced features to proactively manage their sender reputations. Port25 customers include top-ranked email service providers and leading brands such as MySpace, iVillage, Cabela's and CareerBuilder. Founded in 1999, Port25's mission is to realize the potential of email as a platform for legitimate and effective customer communications. http://www.port25.com

Contact
Port25 Solutions, Inc.
6011 University Blvd., Suite 470
Ellicott City, MD 21043
Tel:  410-750-7687
Fax: 410-750-1737

Port25 and PowerMTA are trademarks of Port25 Solutions, Inc.