Learn the techniques necessary to build a secure e-mail server using the UNIX operating system and Open Source e-mail server software.

• This is one of the first books to address UNIX e-mail security.
• E-mail software packages discussed in this book are widely used, and administrators need documentation that instructs how to install, configure, and operate them in a secure environment.
• Administrators will become familiar with packages and utilities that can be used to increase the security of the e-mail server.

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.

Richard Blum has been a network and systems administrator for more than 10 years for a large government organization. He has had the opportunity to use Linux in a network environment as an e-mail server, FTP server, and network monitoring device for about 5 years. This experience has allowed him to gain an understanding of large e-mail systems on the Internet. He also volunteers for a non-profit organization doing network administration. On this particular project, he has been involved with a team that designs and installs a local network file system and an Internet e-mail system for a small 30 user network. By working in both large and small network environments, he can relate to the problems of most network administrators in the field.