CONTENTS

 1 Scope 
2 References 
3 Definitions  
4 Abbreviations and acronyms        
5 Conventions     
6 Introduction to countering e-mail spam     
        6.1 Concept and Characteristics of spam         
        6.2 Approaches to countering e-mail spam       
7 Anti-spam technologies    
        7.1 Overview  
        7.2 The importance of tool/technology context  
        7.3 Combining tests     
        7.4 Types of anti-spam technologies     
        7.5 Existence of the sender's domain and eliciting a response    
        7.6 Existence of a pointer record (PTR)           
        7.7 Blacklists/whitelists
        7.8 Address of the sending server treated as either "dynamic" or "residential"     
        7.9 Filtering  
       7.10 HELO/CSV         
       7.11 Greylisting
       7.12 Tokens/passwords
       7.13 Various techniques
       7.14 How to use this review of technologies and factors to consider      
       7.15 Rejection in the SMTP session      
       7.16 Silent rejection      
       7.17 Rejection by sending a DSN (delivery status notification or "bouncing")      
       7.18 Delivery to a spam box     
       7.19 Marking
Appendix I – Activities on countering e-mail spam     
        I.1 Introduction         
        I.2 International activities on countering spam 
        I.3 Development of technical specifications for countering spam          
        I.4 List of industry alliances and initiatives for countering spam
Bibliography