NETWORK WORLD NEWSLETTER: MICHAEL OSTERMAN ON MESSAGING 11/30/04 Today's focus: Spam filters start to consider reputation
Dear [EMAIL PROTECTED], In this issue: * What you do in e-mail will come back to haunt you * Links related to Messaging * Featured reader resource _______________________________________________________________ This newsletter is sponsored By BMC Software Linking IT Priorities to Business Objectives, an IDC whitepaper. Get insights from IDC on aligning business goals and IT priorities. IDC offers practical, actionable information on how Business Service Management can help you reduce operating costs, improve service levels, respond faster to business needs and protect delivery of business-critical. Click here to download this whitepaper now. http://www.fattail.com/redir/redirect.asp?CID=88759 _______________________________________________________________ COMPREHENSIVE APPLICATIONS RESOURCE Go to NW Fusion's Research Center for detailed information on applications. Find the latest breaking news, case studies, white papers, commentary, reviews and more. Topics on how to rebuild Jboss from source code, how to build advanced forms, compartmentalizing the internet and more are all found in the Research Center. Click here: http://www.fattail.com/redir/redirect.asp?CID=89273 _______________________________________________________________ Today's focus: Spam filters start to consider reputation By Michael Osterman The current message from a politician, news anchor, salesperson, advertisement or colleague is quite often less important to us than the sum of the things they've told us in the past. In other words, what we've heard in the past is very often a more reliable indicator of what to believe than what we're hearing in the present. That's really the paradigm behind reputation filters used in blocking spam, filters that can often provide a better means of blocking spam than content-based filtering systems working on their own. Basically, a reputation-based anti-spam system uses an enormous database that contains information about the behavior of millions of IP addresses. E-mail coming from IP addresses that, in the past, have sent large quantities of potentially spammy e-mail are regarded as more suspect than IP addresses that have not been the source of spam. The fundamental advantage of reputation systems is that they essentially are a data mining system, helping a spam-blocking system to evaluate a message based not only on its content, but also the past behavior of its source. A large and growing number of anti-spam vendors use reputation analysis to block spam. Kelkea, for example, uses a network of data centers in North America to monitor millions of IP addresses - the company is planning to expand its operations into Europe and Asia. IronPort, using its SenderBase technology, monitors a significant percentage of the world's IP traffic to determine the behavior of millions of sources of e-mail. Many other vendors offering reputation-based anti-spam services, including CipherTrust, Symantec Brightmail and MX Logic, to name but a few of the vendors offering capabilities in this area. The real advantage of reputation-based anti-spam systems is in what you can do with the information about a source of e-mail. While it is possible to use this information to block e-mail coming from IP addresses, a more useful approach might be to simply throttle back the flow of e-mail coming from suspect sources; doing so allows e-mail to get through if it's legitimate, while minimizing the impact if it's not. RELATED EDITORIAL LINKS ICQ joins Web-mail battles Network World, 11/29/04 http://www.nwfusion.com/news/2004/112904icq.html _______________________________________________________________ To contact: Michael Osterman Michael D. Osterman is the principal of Osterman Research <http://www.ostermanresearch.com/>, a market research firm that helps organizations understand the markets for messaging, directory and related products and services. He can be reached by clicking here <mailto:[EMAIL PROTECTED]> _______________________________________________________________ This newsletter is sponsored By BMC Software Linking IT Priorities to Business Objectives, an IDC whitepaper. Get insights from IDC on aligning business goals and IT priorities. IDC offers practical, actionable information on how Business Service Management can help you reduce operating costs, improve service levels, respond faster to business needs and protect delivery of business-critical. Click here to download this whitepaper now. http://www.fattail.com/redir/redirect.asp?CID=88759 _______________________________________________________________ ARCHIVE LINKS Archive of the Messaging newsletter: http://www.nwfusion.com/newsletters/gwm/index.html _______________________________________________________________ Under attack! Tips for protecting the enterprise application data center Find out how to provide practical security to real world applications. Hear about a solution that provides protection within a single gateway against all types of threats during this new webcast "Defending Your Business With Application Security". http://www.fattail.com/redir/redirect.asp?CID=89272 _______________________________________________________________ FEATURED READER RESOURCE DOWNLOAD INDUSTRY WHITE PAPERS NOW NW Fusion's White Paper Library is your source for the latest industry white papers. 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