Open Source E-Mail Security

Three separate e-mail server packages are discussed: sendmail, qmail, and Postfix. Each security topic provides hands-on examples using each of the three e-mail packages. The book primarily focuses on providing instructions for Internet Service Providers (ISPs) and small corporate network administrators for configuring Open Source e-mail packages to provide secure e-mail services to customers. Additional information educates the reader on basic e-mail principles and protocols.

Contents

• Introduction

• E-mail Basics
• SMPT
• POP3
• IMAP
• MIME
• Reading E-mail Headers

• Securing the UNIX Server
• The Sendmail E-mail Package
• The qmail E-mail Package
• The Postfix E-mail Package
• Preventing Open Relays
• Blocking Spam
• Filtering Viruses

• Using E-mail Firewalls
• Using SASL
• Secure POP3 and IMAP Servers
• Secure Webmail Servers