By Paul Wolfe, Charlie Scott, Mike Erwin
Each year companies spend billions of greenbacks scuffling with the overpowering volume of junk electronic mail their staff obtain. With the Anti-Spam Toolkit, platforms directors have at their fingertips the instruments they should considerably lessen junk electronic mail. via real-world software program and examples, the authors reveal the way to determine junk mail, installation the best-suited anti-spam method for a enterprise, maintain valid e mail from being flawed for junk mail, adapt and enhance anti-spam structures, and remain one step sooner than spammers. in addition they disguise the newest and most well liked applied sciences in the marketplace for the proactive structures administrator. The CD-ROM comprises all of the instruments mentioned within the e-book.
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Additional info for Anti-Spam Toolkit
Table 4-5: Linux/UNIX Server Filtering Comparison Spam Fighting Rules / Features: Packages Patterns / Distribute Checksum Chapter 4: Anti-Spam Implementation Strategies Sorts to Folders Statistical or Challenge/Response Other Bayesian System 43 44 Chapter 4: Anti-Spam Implementation Strategies Signatures Vipul's Razor DCC Bogofilter SpamBayes Quick Spam Filter Active Spam Killer The Spam Bouncer √ Network √ √ Classifier √ √ √ √ √ √ √ √ Gateway-Based Spam Systems Gateway-based spam solutions are growing in popularity and as of this writing, almost two dozen vendors, some as established as five years old, are already dominating the scene.
Table 4-4 summarizes the similarities and differences between a few of the major Window’s-based server offerings covered later in the book. Table 4-4: Windows Server–Based Filtering Comparison Spam Fighting Rules / Features: Patterns / Packages Signatures Act as a Proxy iHateSpam √ Server Edition GFI Mail √ Essentials Trend Spam √ √ Prevention Linux/UNIX Server-Based Filtering Sorts to Folders Statistical or Other Bayesian Classifier Black/ Whitelists √ (√) √ √ √ √ √ Real-time Blacklist Lookups Automation for Updates to Rules, Software, Signatures (P2P) √ √ √ √ In Chapter 13, we cover the basics of what spam-fighting software is available for the UNIX/Linux Operating System.
The challenge relies on a timely response from the sender, and after the initial query is approved, the system is silent and nonintrusive. All in all, using a challenge/response in filtering out unwanted communication partners has gotten a firm following, and from the outset it seems to be on a growing track. A big drawback with the challenge/response system, however, is that it requires a certain amount of time and effort before normal communication can take place. This becomes somewhat nasty when dealing with lots of addresses that are both new and valid.