An anti-spam software application released by Yahoo! in 2005. By using a combination of public and private keys to authenticate the sender’s domain, this software is supposed to reduce the likelihood that a spammer or a cracker could fake the domain sending address.
MarketingSherpa, Inc. The Ultimate Email Glossary: 180 Common Terms Defined. [Online, 2004.] Marketing Sherpa, Inc. Website. http://www.marketingsherpa.com/ sample.cfm?contentID=2776.