Utility software company Symantec is to acquire antispam supplier Brightmail in a deal worth about $370m in cash.
Symantec said it is buying the company to complement its existing gateway-security products in the fight against spam.
The deal is expected to close by early July.
"Spam has increasingly become one of the most severe threats to individuals and enterprises today, topping viruses as the number one problem plaguing email systems and administrators," said Symantec chairman and chief executive officer John W Thompson. "Brightmail is the leader in helping enterprises, service providers and wireless carriers mitigate this threat."
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Symantec had already made an investment in Brightmail in 2000 and now holds an equity stake in the company of around 11%.
Brightmail president and CEO Enrique Salem said, "By joining forces with Symantec, we can provide our combined base of customers around the world with the broadest messaging security solution in the industry."
Brightmail customers include Avaya, eBay, Cisco Systems, Microsoft and Lucent Technologies.
Todd R Weiss writes for Computerworld