The time is ripe for marketers to implement e-mail authentication, but there are a few things to consider before rushing in, according to a new whitepaper from e-mail software provider Strongmail.

To those e-mail senders who have been waiting for the industry to settle on a standard, that wait is over, according to Dave Lewis, VP of alliances and market development at Strongmail. Two standards, the path-based SenderID and the crypto-based Domain Keys Identified Mail (DKIM), have become de-facto standards.

"The end game is the restoration of trust and reliability to e-mail so legitimate communication and commerce can flourish. So while e-mail authentication may not be the destination, it is a crucial starting point," Lewis said.

SenderID verifies that the server sending e-mail for a particular domain is authorized to do so. Senders create a text file on each authorized server, and e-mail receivers check the domain from which the e-mail is received against the SPF (Sender Policy Framework) file stored on the sender's server.

Lewis suggests that e-mail senders consider implementing SenderID on all outbound e-mail, because it is a low cost solution, it's easy to implement, and it does not create additional load on the server.

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