![]() ![]() ![]() AOL said in January that it's testing SPF for outgoing mail, publishing the Internet Protocol addresses of its e-mail servers in an SPF record in the Domain Name System. Yahoo is promoting an internally developed technology called DomainKeys, that uses public-key cryptography to "sign" e-mail messages. and Hotmail as well as Internet service provider America Online Inc., have all backed slightly different sender-authentication proposals. So far, EarthLink has stayed out of the sender-authentication fray, while Web-based e-mail services, including Yahoo Inc. Sender-authentication technologies attempt to stop spoofing by matching the source of e-mail messages with a specific user or an approved e-mail server for the Internet domain that the message purports to come from. Spammers and Internet-based criminals often fake, or "spoof," the origin of e-mail messages to trick recipients into opening them and trusting their content.
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