The move, announced Wednesday, combines two techniques that rely on cryptography to help determine whether the sender of an e-mail message is legitimate. Sending messages using a false address is a common tactic of spammers.

"This is the first time that we've had something fundamental to the mail system that the vendors could get together and agree on," said Sendmail Chief Technology Officer Eric Allman, an e-mail pioneer who helped merge the technologies. "That's an amazing thing right there."

The combined technology, DomainKeys Identified Mail, borrows elements from Yahoo's Domainkeys and Cisco's Internet Identified Mail system.

Though there are technical differences, both attach scrambled digital signatures to mail, which then can be checked to ensure that it was actually sent from the domain in the sender's address. Users typically won't see the information unless they view the message's header.

Read this full article at Information Week

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