TurnTide Inc., the anti-spam technology start-up in Conshohocken, has been acquired by security giant Symantec Corp. for about $28 million in cash.
Symantec spokeswoman Genevieve Haldeman said yesterday that TurnTide's hardware and software determined spammers' online addresses and prevented spam e-mails from reaching recipients' inboxes.
"Say you get 10,000 e-mail coming from the same address," Haldeman said. "TurnTide identifies that it's not typical to send 10,000 e-mails. What's unique is that this technology is looking at the Internet protocol address to determine where it came from, and stopping it there. E-mail doesn't have the opportunity to leave the senders' server."