SpamAssassin

Description:

The annoyance factor for individual users whose email is crammed with pitches for pornography, absurd moneymaking schemes, and dubious health products is fierce. But for organizations, the cost of spam in lost productivity and burned bandwidth is astronomical. While society is grappling with a solution to the burgeoning crisis of spam proliferation, the pressure is on system administrators to find a solution to this massive problem in-house. And fast.

Sys admins can field scores of complaints and spend months testing software suites that turn out to be too aggressive, too passive, or too complicated to setup only to discover that SpamAssassin (SA), the leading open source spam-fighting tool, is free, flexible, powerful, highly-regarded, and remarkably effective. The drawback? SpamAssassin's lack of published documentation.

SpamAssassin by Alan Schwartz, is the only published resource devoted to SpamAssassin and how to integrate it effectively into your networks. This clear, concise guide clarifies the installation, configuration, and use of the SpamAssassin spam-checking system (versions 2.63 and 3.0) for Unix system administrators using the Postfix, Sendmail, Exim, or qmail mail servers, helping administrators make the right integration decision for their particular environments.

It covers concrete advice on how to:

• Customize SpamAssassin's rules, and even create new ones Train SpamAssassin's Bayesian classifier, a statistical engine for detecting spam, to optimize it for the sort of email that you typically receive
  
• Block specific addresses, hosts, and domains using third-party blacklists like the one maintained by Spamcop.net.
  
• Whitelist known good sources of email, so that messages from clients, coworkers, and friends aren't inadvertently lost.
  
• Configure SpamAssassin to work with newer spam-filtering methods such as Hashcash (www.hashcash.org) and Sender Policy Framework (SPF).

Sys admins, network administrators, and ISPs pay for spam with hours of experimentation and tedious junk email management, frayed user tempers, and their sanity. SpamAssassin, together with this essential book, give you the tools you need to take back your organization's inboxes.

"Detailed, accurate and informative--recommended for spam-filtering beginners and experts alike." --Justin Mason, SpamAssassin development team

 

Table of Contents:

Preface

1. Introducing SpamAssassin

     How SpamAssassin Works

     Organization of SpamAssassin

     Mailers and SpamAssassin

     The Politics of Scanning

2. SpamAssassin Basics

     Prerequisites

     Building SpamAssassin

     Invoking SpamAssassin with procmail

     Using spamc/spamd

     Invoking SpamAssassin in a Perl Script

     SpamAssassin and the End User

3. SpamAssassin Rules

     The Anatomy of a Test

     Modifying the Score of a Test

     Writing Your Own Tests

     The Built-in Tests

     Whitelists and Blacklists

4. SpamAssassin as a Learning System

     Autowhitelisting

     Bayesian Filtering

5. Integrating SpamAssassin with sendmail

     Spam-Checking at Delivery

     Spam-Checking During SMTP

     Building a Spam-Checking Gateway

6. Integrating SpamAssassin with Postfix

     Postfix Architecture

     Spam-Checking During Local Delivery

     Spam-Checking All Incoming Mail

     Building a Spam-Checking G ateway

7. Integrating SpamAssassin with qmail

     qmail Architecture

     Spam-Checking During Local Delivery

     Spam-Checking All Incoming Mail

     Building a Spam-Checking Gateway

8. Integrating SpamAssassin with Exim

     Spam-Checking via procmail

     Spam-Checking All Incoming Mail

     Using Routers and Transports

     Using exiscan

     Using sa-exim

     Building a Spam-Checking Gateway

9. Using SpamAssassin as a Proxy

     Using Pop3proxy

     Using SAproxy Pro

Appendix

Index

描述：
個別使用者的郵件充斥著色情、荒謬的賺錢計劃和可疑的健康產品，對他們來說，這是一個非常煩人的問題。但對於組織來說，垃圾郵件造成的生產力損失和頻寬浪費的成本是巨大的。當社會正在努力解決垃圾郵件激增的危機時，系統管理員面臨著在內部找到解決這個巨大問題的壓力。而且要快速解決。

系統管理員可能會收到大量的投訴，並花費數月時間測試軟件套件，結果發現它們要麼過於激進，要麼過於被動，要麼設置過於複雜，最終發現SpamAssassin（SA）這個領先的開源垃圾郵件防護工具是免費、靈活、強大、廣受好評且非常有效。缺點是SpamAssassin缺乏公開的文檔。

《SpamAssassin》是Alan Schwartz撰寫的唯一一本關於SpamAssassin及其如何有效整合到您的網絡中的出版資源。這本清晰、簡潔的指南澄清了Unix系統管理員在使用Postfix、Sendmail、Exim或qmail郵件服務器時安裝、配置和使用SpamAssassin垃圾郵件檢查系統（版本2.63和3.0）的過程，幫助管理員為他們特定的環境做出正確的整合決策。

它提供了以下方面的具體建議：
- 自定義SpamAssassin的規則，甚至創建新的規則
- 訓練SpamAssassin的貝葉斯分類器，一種用於檢測垃圾郵件的統計引擎，以優化其對您通常接收的郵件類型的檢測
- 使用Spamcop.net等第三方黑名單阻止特定地址、主機和域名
- 將已知的良好郵件來源列入白名單，以避免意外丟失來自客戶、同事和朋友的郵件
- 配置SpamAssassin與Hashcash（www.hashcash.org）和Sender Policy Framework（SPF）等新的垃圾郵件過濾方法一起使用

系統管理員、網絡管理員和互聯網服務提供商花費了大量時間進行實驗和繁瑣的垃圾郵件管理，使用戶的情緒緊張，甚至影響他們的理智。SpamAssassin和這本必讀的書籍將為您提供重新掌控組織收件箱所需的工具。

目錄：
前言
1. 介紹SpamAssassin
- SpamAssassin的工作原理
- SpamAssassin的組織架構
- 郵件服務器和SpamAssassin
- 掃描的政策
2. SpamAssassin基礎知識
- 先決條件
- 構建SpamAssassin
- 使用procmail調用SpamAssassin
- 使用spamc/spamd
- 在Perl腳本中調用SpamAssassin
- SpamAssassin和最終用戶
3. SpamAssassin規則
- 測試的結構
- 修改測試的分數
- 編寫自己的測試
- 內置測試
- 白名單和黑名單
4. SpamAssassin作為學習系統
- 自動白名單
- 貝葉斯過濾
5. 將SpamAssassin與s整合