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Symantec Signs Agreement With Yahoo! To Provide Anti-Virus Technology For Yahoo! Mail

Symantec's Highly Scaleable Anti-Virus Technology Helps Protect Millions of Yahoo! Mail Users From Viruses and Malicious Mobile Code

CUPERTINO, Calif. - May 16, 2000 - Symantec Corp. (Nasdaq: SYMC) today announced an agreement with Yahoo! Inc. (Nasdaq: YHOO) to provide Symantec's award-winning anti-virus technology to users of Yahoo!® Mail (http://mail.yahoo.com), one of the Internet's most popular Web-based mail services. Under the agreement, Symantec's carrier-class anti-virus technology will be seamlessly integrated into Yahoo! Mail to provide millions of Yahoo! Mail users with virus protection that will help them, and the friends and colleagues they send file attachments to, guard against e-mail borne viruses and malicious mobile code.

Starting immediately, Symantec's industry-leading anti-virus technology will scan e-mail file attachments sent and received via Yahoo! Mail, part of Yahoo!'s global communications platform. The carrier-class anti-virus technology will automatically scan all Yahoo! Mail users' outgoing e-mails to protect them from distributing file attachments containing viruses or malicious mobile code. To ensure they do not receive virus-infected e-mails, Yahoo! Mail users can also choose to have their incoming e-mail files scanned. When known viruses are detected in an attachment, Symantec's anti-virus technology will instantly clean the attachment, if possible, and, at the user's request, Yahoo! Mail will then notify the sender that he or she sent a virus-infected attachment.

Yahoo! Mail users who would like additional virus protection can choose from a full suite of Norton AntiVirus products from Symantec's online store, accessible via Yahoo! Shopping (http://shopping.yahoo.com).

"A carrier-grade anti-virus solution at the Internet infrastructure level is a critical component to stopping the rapid proliferation of e-mail borne attacks," said John W. Thompson, Symantec chairman, president and CEO. "By integrating Symantec's anti-virus technology into Yahoo! Mail, Yahoo! is taking proactive measures to protect the millions of Yahoo! Mail users from the increasing threat of viruses and malicious mobile code transmitted via e-mail. Our agreement provides Yahoo! a highly scaleable, reliable solution to ensure that e-mail traffic flowing into and out of Yahoo! Mail servers is safe and clean."

"Integrating Symantec's anti-virus technology into Yahoo! Mail provides another valuable service for the millions of people using Yahoo! Mail and allows them to send and receive virus-free e-mail," said Lisa Pollock, senior producer, Yahoo! Inc. "Yahoo! Mail users can enjoy peace-of-mind knowing the attachments they send and receive using Yahoo! Mail are protected by a leading provider of anti-virus technology. We're very pleased to offer this new feature to our large audience."

Viruses and mobile code transmitted in e-mail are becoming increasingly common and can literally shut down a home computer or business within minutes. Symantec's anti-virus technology works at the gateway to provide fast, effective virus resolution for protecting the enterprise from rapidly-spreading e-mail-borne viruses‹with minimal impact on network performance and maximum uptime.

Symantec's anti-virus technology provides one of the industry's fastest turnaround times on unknown viruses with a new Quarantine Console, the latest scan engine and decomposers, and Symantec's Scan and Deliver technology. As new computer viruses appear, the Symantec AntiVirus Research Center (SARC) develops identification and detection for these viruses and provides either a repair or delete operation, thus keeping users protected against the latest virus threats.

Pricing and Availability
Seamlessly integrated into Yahoo! Mail, the Symantec anti-virus protection is available immediately to Yahoo! Mail users at no charge.

About Symantec
Symantec is the world leader in providing solutions to help individuals and enterprises assure the security, availability, and integrity of their information. Headquartered in Cupertino, Calif., Symantec has operations in more than 40 countries. More information is available at www.symantec.com.

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Symantec, the Symantec logo, VERITAS, and the VERITAS logo are trademarks or registered trademarks of Symantec Corporation or its affiliates in the United States and certain other countries. Additional company and product names may be trademarks or registered trademarks of the individual companies and are respectfully acknowledged.

FORWARD LOOKING STATEMENT: This press release contains forward-looking statements. There are certain important factors that could cause Symantec's future development efforts to differ materially from those anticipated by some of the statements made above. Among these are the anticipation of the growth of certain market segments, the positioning of Symantec's products in those segments, the competitive environment in the software industry, new security threats, dependence on other products, changes to operating systems and product strategy by vendors of operating systems, and the importance of new Symantec products. Additional information concerning those and other factors is contained in the "Risk Factors" section of the company's annual report on Form 10-K for the fiscal year ended April 2, 1999.