Press Release

Port25's PowerMTA is the First Outbound E-mail Gateway to Support Sender ID Framework for Delivery of Authenticated E-mail

Port25 Makes it Easy for Senders to Adopt the Latest E-mail Security Standards

Ellicott City, MD --(BUSINESS WIRE)-- August 31, 2004 - Port25 Solutions Inc., the leading provider of outbound e-mail delivery software for customer communications, announces that it has successfully integrated support for Sender ID into PowerMTA. PowerMTA 3.0 allows senders to automatically deliver e-mail that is fully compliant with the Sender ID specification.

“Port25 is focused on solving a critical piece of the e-mail security puzzle – sender compliance and adoption”, said Craig Spiezle, Director of Industry and Partner Relations, Microsoft (NASDAQ: MSFT) Safety Technology and Strategy Team. “With products like PowerMTA making it easy for outbound e-mailers to implement the Sender ID Framework, enterprises and e-mail service providers will be able to adopt the new standards quickly.”

PowerMTA is designed specifically to address the e-mail delivery challenges of customer communications and e-mail marketing. In addition to direct support for Sender ID, PowerMTA provides several other advanced features that help enterprises and e-mail service providers proactively manage their reputations as e-mail senders including: secure submission, delivery volume management, outbound mail segmentation, direct support for Habeas Sender Warranted Email, and real-time detection of reputation issues that could result in sender e-mail blocking.

Support for Sender ID is available in PowerMTA 3.0 which will be generally released on September 15th, 2004.

About Port25 Solutions, Inc. Port25 Solutions, Inc. provides specialized e-mail infrastructure software products that address the unique demands of customer communications and e-mail marketing applications. PowerMTA(TM), Port25's flagship product, provides senders with superior performance and advanced features to proactively manage their sender reputations. Port25 customers include leading e-mail service providers (including Responsys, Silverpop, Socketware, Britemoon and WhatCounts) and large enterprises (including Travelocity, Mary Kay, Cabela's and Creative Labs, Inc.). As a member of the E-mail Service Provider Coalition (ESPC) and the Anti-Phishing Working Group (APWG), Port25's goal is to help fight spam from the send side.

Port25 and PowerMTA are trademarks of Port25 Solutions, Inc.