Open Source E-mail Security

By: Richard Blum

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Paperback | 10 October 2001

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In this book you'll learn the technology underlying secure e-mail systems, from the protocols involved to the open source software packages used to implement e-mail security. This book explains the secure MIME (S/MIME) protocol and how it is used to protect data transmitted across the Internet. It also explains the concepts crucial to stopping spam messages using the three most popular open source mail packages--sendmail, qmail, and postfix. It presents detailed configurations showing how to avoid accepting messages from known open relays and how to filter known spam messages. Advanced security topics are also covered, such as how to install and implement virus scanning software on the mail server, how to use SMTP authentication software, and how to use the SSL protocol to secure POP, IMAP, and WebMail servers.

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Non-Fiction Computing & I.T.Computer Networking & Communications Electronic Mail or Email for Professionals Computer Programming & Software Development Network Security Computer Security Data Encryption Digital Lifestyle & Online World: Consumer & User Guides Internet Guides & Online Services

Introduction
E-Mail Principles
E-mail Basics
Unix E-mail Systems
E-mail Protocols
E-mail Security
Summary
SMTP
SMTP Description
Extended SMTP
Message Formats
Summary
POP3
Description of the Post Office Protocol
POP3 Authentication Methods
POP3 Client Commands
Open Source POP3 Implementations
Summary
IMAP
Description of the Interactive Message Access Protocol
IMAP Authentication Methods
IMAP Client Protocol
Open Source IMAP Implementations
Summary
MIME
The Uuencode Program
MIME and Binary Data
S/MIME
Open Source MIME Packages
MIME with PGP
Summary
Reading E-mail Headers
Decoding Forged E-mail Headers
Using DNS Programs to Track E-mail Hosts
Using External Spam Services
Summary
Server Security
Securing the UNIX Server
Monitoring Log Files
Preventing Network Attacks
Blocking Network Access to the Server
Detecting Break-ins
Summary
The sendmail E-mail Package
What Is sendmail? Configuring sendmail
Using the m4 Preprocessor
The sendmail Command Line
Installing sendmail
Securing sendmail
Summary
The qmail E-mail Package
What Is qmail? Control Files
Downloading and Compiling the qmail Source Code
Configuring qmail
Using the qmail sendmail Wrapper
Receiving SMTP Messages
qmail and Security
Summary
The Postfix E-mail Package
What Is Postfix? Downloading and Compiling Postfix
Configuring Postfix
Starting Postfix
Postfix and Security
Summary
Preventing Open Relays
Open and Selective Relaying
Configuring Selective Relaying
Avoiding Open Relays
Summary
Blocking Spam
Methods Used to Block Spam
Implementing Spam Blocking
Summary
Filtering Viruses
Methods Used to Block Viruses
Implementing Virus Filtering
Implementing Virus Scanning
Summary
E-Mail Service Security
Using E-mail Firewalls
The SMTP VRFY and EXPN Commands
Disabling the VRFY and EXPN Commands
Using an E-mail Firewall
Creating an E-mail Firewall
Summary
Using SASL
What Is SASL? The Cyrus-SASL Library
Implementing SASL
Testing the SASL Server
Summary
Secure POP3 and IMAP Servers
The SSL Family of Protocols
The OpenSSL Package
Using UW IMAP with SSL
Summary
Secure Webmail Servers
What Is Webmail? The TWIG Webmail Server
The MySQL Database
The Apache Web Server with PHP Support
Installing the TWIG Webmail Server
Summary
Table of Contents provided by Publisher. All Rights Reserved.

Open Source E-mail Security

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