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Symantec and Clearswift Settle Pending Litigation

Clearswift Agrees to Intellectual Property License

CUPERTINO, Calif. - April 30, 2004 - Symantec Corp. (Nasdaq: SYMC), the global leader in information security, today announced that it has reached a settlement agreement with Clearswift Limited in the case involving Symantec's U.S. Patent No. 5,319,776, which covers in-transit scanning for malicious code.

As part of the agreement, Clearswift obtained a non-exclusive patent license from Symantec for Clearswift's content security products. The terms of the settlement are confidential. This agreement resolves all pending litigation between the two companies.

Symantec purchased the patent in August 2003 as part of a settlement in Hilgraeve, Inc. v. Symantec Corp. and therefore became the plaintiff in the pending litigation against several defendants including Clearswift (see Aug. 18, 2003 press release).

About Clearswift Limited
Clearswift is the world's leading provider of software for managing and securing electronic communications. Clearswift solutions ensure business compliance through safe messaging, secure boundaries and best practice in electronic communications. Clearswift delivers the capabilities for organizations to protect themselves against email and web-based threats, meet legal and regulatory requirements, implement productivity-saving policies and manage intellectual property passing through their network. Clearswift's software portfolio includes Clearswift ENTERPRISEsuite™, a software infrastructure for managing e-policies in complex environments and Clearswift MIMEsweeper™, a product family for email and web e-policies and. More information about Clearswift, its products and services is available at

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

NOTE TO EDITORS: : If you would like additional information on Symantec Corporation and its products, please view the Symantec Press Center at on Symantec's Web site. All prices noted are in US dollars and are valid only in the United States.

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.

Clearswift, MAILsweeper, MIMEsweeper, spamActive and ENTERPRISEsuite are trademarks or registered trademarks, in the United States, United Kingdom and certain other countries, of Clearswift Limited. Additional company and product names may be trademarks or registered trademarks of the individual companies and are respectfully acknowledged.