Press Release

May 10, 2000

EarthLink Pilots Wireless Email With BlackBerry Wireless Handhelds

EarthLink Airmanager™ featuring BlackBerry™ Lets Customers Access Email Everywhere

Atlanta and Waterloo, Ontario - EarthLink, Inc. (NASDAQ: ELNK), the nation's second largest Internet Service Provider (ISP), has begun a market test of EarthLink Airmanager™ , a wireless service featuring BlackBerry Internet Edition™ from Research In Motion Limited (NASDAQ: RIMM; TSE: RIM). EarthLink Airmanager allows EarthLink members to send and receive email messages using the BlackBerry wireless email solution. Airmanager is the first product to be offered by the company's newly launched product group, EarthLink Everywhere, an initiative to develop and introduce wireless Internet services to EarthLink's existing member base.

"Our members check their email an average of five times a day," said Tom Andrus, vice president of product management for EarthLink. "EarthLink Airmanager represents a significant innovation for EarthLink members who are increasingly dependent on email. Whether it's access to check email via their computer, wireless handheld, wireless phones, or any portable handheld device, we're giving our members yet another way to access their EarthLink email account everywhere they go."

The EarthLink Airmanager service featuring BlackBerry allows EarthLink members to read, forward, reply to and originate email messages -- all via wireless technology -- using their existing EarthLink email address. BlackBerry uses a "push" method of email delivery so messages are automatically routed to the wireless handheld without any effort required by the user. The award-winning BlackBerry Wireless Handheld™ features an optimized display, fully functioning keyboard, thumb-operated trackwheel and an intuitive interface, making it easier to use than most electronic organizers. An integrated suite of applications also provides a personal organizer with PC synchronization software, message filtering capabilities, and back-up utilities.

"Today, people are tied to their laptops, or even their desktop PCs to check their email -- but not for long," Andrus continued. "In fact, if a business traveler carries a laptop only to check email, this five-ounce device will be a marvel."

"Email has become an extremely important method of communication in people's lives and wireless email service is a natural progression for leading Internet service providers such as EarthLink," said David Werezak, vice president of marketing at Research In Motion. "Through this pilot program, EarthLink will be able to provide their customers with the same wireless email experience that is generating praise and awards for BlackBerry."

The pilot is open to existing EarthLink members, but will be limited to 500 members. The service will cost $34.95 per month for unlimited email messaging, which includes lease of the BlackBerry Wireless Handheld. Complete information regarding the service and how members can qualify for the test is available on the company's Web site: http://www.earthlink.net/wireless/airmanager.

EarthLink, EarthLink Everywhere and the EarthLink logo are trademarks of EarthLink, Inc. Research In Motion, RIM, BlackBerry, BlackBerry Wireless Handheld, BlackBerry Internet Edition and the BlackBerry logo are trademarks or registered trademarks of Research In Motion Limited.

About Research In Motion Limited

Research In Motion Limited is a leading designer, manufacturer and marketer of innovative wireless solutions for the mobile communications market. Through development and integration of hardware, software and services, RIM provides solutions for seamless access to time-sensitive information including email, messaging, Internet and intranet-based applications. RIM technology also enables a broad array of third party developers and manufacturers in North America and around the world to enhance their products and services with wireless connectivity. RIM's portfolio of award-winning products includes the RIM Wireless Handheld™ product line, the BlackBerry™ wireless email solution, wireless personal computer card adapters, embedded radio-modems and software development tools. Founded in 1984 and based in Waterloo, Ontario, RIM is listed on the Nasdaq Stock Market (NASDAQ: RIMM) and the Toronto Stock Exchange (TSE: RIM). Investors may contact investor_relations@rim.net. Customers may contact info@rim.net. Web site: www.rim.net.

About EarthLink

EarthLink is one of the world's leading Internet service providers, bringing the magic of the Internet to approximately 3.5 million individuals and businesses every day. Headquartered in Atlanta, EarthLink provides a full range of innovative access, hosting, and eCommerce solutions to thousands of communities internationally from more than 5,000 points of presence. EarthLink is committed to doing an exceptional job of pleasing its customers, shareholders, and the community by following the company's Core Values and Beliefs. Information about EarthLink and EarthLink Sprint services is available by calling (800) 395-8425 and through EarthLink's Web site at http://www.earthlink.net/.

It's your Internet.

Forward-looking statements in this news release are made pursuant to the "safe harbor" provisions of the United States Private Securities Litigation Reform Act of 1995. Investors are cautioned that such forward-looking statements involve risks and uncertainties, including, without limitation, risks relating to possible product defects and product liability, risks related to international sales and potential foreign currency exchange fluctuations, risks related to the year 2000 issue, continued acceptance of RIM's products, increased levels of competition, technological changes, dependence on intellectual property rights and other risks detailed from time to time in RIM's periodic reports filed with the United States Securities and Exchange Commission and other regulatory authorities.