Exchange Server 2003 and the Intelligent Message Filter reduce the amount of spam by using advanced server-side technology powered by SmartScreen and client-side filtering offered through Outlook to identify both unwanted and legitimate e-mail. The combination of connection-level, protocol-level, and content-level protection provides an end-to-end e-mail hygiene solution that increases user productivity and reduces the network and storage costs associated with junk e-mail messages.Exchange Server 2007 offers best-of-breed e-mail hygiene protection, with significantly more capabilities than Exchange Server 2003. It delivers integrated antispam technologies, including support for real-time IP block list services, IP reputation services, daily spam and IP reputation definition updates through Microsoft Update, e-mail authentication by using the Sender ID Framework, anti-phishing protection, and optional attachment stripping and .zip file inspection.
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