sendmail Cookbook

More often than not, the words "sendmail configuration" strike dread in the hearts of sendmail and system administrators--and not without reason. sendmail configuration languages are as complex as any other programming languages, but used much more infrequently--only when sendmail is installed or configured. The average system administrator doesn't get enough practice to truly master this inscrutable technology. Fortunately, there's help. The sendmail Cookbook provides step-by-step solutions for the administrator who needs to solve configuration problems fast. Say you need to configure sendmail to relay mail for your clients without creating an open relay that will be abused by spammers. A recipe in the Cookbook shows you how to do just that. No more wading through pages of dense documentation and tutorials and creating your own custom solution--just go directly to the recipe that addresses your specific problem. Each recipe in the sendmail Cookbook outlines a configuration problem, presents the configuration code that solves that problem, and then explains the code in detail. The discussion of the code is critical because it provides the insight you need to tweak the code for your own circumstances. The sendmail Cookbook begins with an overview of the configuration languages, offering a quick how-to for downloading and compiling the sendmail distribution. Next, you'll find a baseline configuration recipe upon which many of the subsequent configurations, or recipes, in the book are based. Recipes in the following chapters stand on their own and offer solutions for properly configuring important sendmail functions such as: Delivering and forwarding mail Relaying Masquerading Routing mail Controlling spam Strong authentication Securing the mail transport Managing the queue Securing sendmail. Cookbook is more than just a new approach to discussing sendmail configuration. The book also provides lots of new material that doesn't get much coverage elsewhere--STARTTLS and AUTH are given entire chapters, and LDAP is covered in recipes throughout the book. But most of all, this book is about saving time--something that most system administrators have in short supply. Pick up the sendmail Cookbook and say good-bye to sendmail dread.

Autorentext
Craig Hunt has worked with computer systems for the last twenty years, including a stint with the federal government as both a programmer and systems programmer. He joined Honeywell to work on the WWMCCS network in the days before TCP/IP, back when the network used NCP. After Honeywell, Craig went to work for the National Institute of Standards and Technology. He's still there today and is currently the leader of the Network Engineering Group. Craig is the author of TCP/IP Network Administration and other O'Reilly books.

Klappentext
More often than not, the words "sendmail configuration" strike dread in the hearts of sendmail and system administrators--and not without reason. sendmail configuration languages are as complex as any other programming languages, but used much more infrequently--only when sendmail is installed or configured. The average system administrator doesn't get enough practice to truly master this inscrutable technology.Fortunately, there's help. The sendmail Cookbook provides step-by-step solutions for the administrator who needs to solve configuration problems fast. Say you need to configure sendmail to relay mail for your clients without creating an open relay that will be abused by spammers. A recipe in the Cookbook shows you how to do just that. No more wading through pages of dense documentation and tutorials and creating your own custom solution--just go directly to the recipe that addresses your specific problem.Each recipe in the sendmail Cookbook outlines a configuration problem, presents the configuration code that solves that problem, and then explains the code in detail. The discussion of the code is critical because it provides the insight you need to tweak the code for your own circumstances.The sendmail Cookbook begins with an overview of the configuration languages, offering a quick how-to for downloading and compiling the sendmail distribution. Next, you'll find a baseline configuration recipe upon which many of the subsequent configurations, or recipes, in the book are based. Recipes in the following chapters stand on their own and offer solutions for properly configuring important sendmail functions such as:
* Delivering and forwarding mail
* Relaying
* Masquerading
* Routing mail
* Controlling spam
* Strong authentication
* Securing the mail transport
* Managing the queue
* Securing sendmail
sendmail Cookbook is more than just a new approach to discussing sendmail configuration. The book also provides lots of new material that doesn't get much coverage elsewhere--STARTTLS and AUTH are given entire chapters, and LDAP is covered in recipes throughout the book. But most of all, this book is about saving time--something that most system administrators have in short supply. Pick up the sendmail Cookbook and say good-bye to sendmail dread.

Zusammenfassung
Each "recipe" in the "sendmail Cookbook "outlines a configuration problem, presents the configuration code that solves that problem, and then explains the code in detail. The book also provides material on STARTTLS and AUTH and LDAP is covered in recipes throughout the book.

Inhalt
Dedication; Preface; Introduction; Using This Cookbook; Audience; Organization; Software Versions; Conventions; We'd Like to Hear from You; Acknowledgments; Chapter 1: Getting Started; 1.1 Introduction; 1.1 Downloading the Latest Release; 1.2 Installing sendmail; 1.3 Compiling sendmail to Use LDAP; 1.4 Adding the regex Map Type to sendmail; 1.5 Compiling sendmail with SASL Support; 1.6 Compiling sendmail with STARTTLS Support; 1.7 Compiling in STARTTLS File Paths; 1.8 Building a sendmail Configuration; 1.9 Testing a New Configuration; 1.10 Logging sendmail; Chapter 2: Delivery and Forwarding; 2.1 Introduction; 2.1 Accepting Mail for Other Hosts; 2.2 Fixing the Alias0 Missing Map Error and Creating Simple Aliases; 2.3 Reading Aliases via LDAP; 2.4 Configuring Red Hat 7.3 to Read Aliases from a NIS Server; 2.5 Configuring Solaris 8 to Read Aliases from a NIS Server; 2.6 Forwarding to an External Address; 2.7 Creating Mailing Lists; 2.8 Migrating Ex-Users to New Addresses; 2.9 Delivering Mail to a Program; 2.10 Using Program Names in Mailing Lists; 2.11 Allowing Nonlogin Users to Forward to Programs; 2.12 Fixing a .forward Loop; 2.13 Enabling the User Database; Chapter 3: Relaying; 3.1 Introduction; 3.1 Passing All Mail to a Relay; 3.2 Passing Outbound Mail to a Relay; 3.3 Passing Local Mail to a Mail Hub; 3.4 Passing Apparently Local Mail to a Relay; 3.5 Passing UUCP Mail to a Relay; 3.6 Relaying Mail for All Hosts in a Domain; 3.7 Relaying Mail for Individual Hosts; 3.8 Configuring Relaying on a Mail Exchanger; 3.9 Loading Class $=R via LDAP; 3.10 Relaying Only Outbound Mail; Chapter 4: Masquerading; 4.1 Introduction; 4.1 Adding Domains to All Sender Addresses; 4.2 Masquerading the Sender Hostname; 4.3 Eliminating Masquerading for the Local Mailer; 4.4 Forcing Masquerading of Local Mail; 4.5 Masquerading Recipient Addresses; 4.6 Masquerading at the Relay Host; 4.7 Limiting Masquerading; 4.8 Masquerading All Hosts in a Domain; 4.9 Masquerading Most of the Hosts in a Domain; 4.10 Masquerading the Envelope Address; 4.11 Rewriting the From Address with the genericstable; 4.12 Rewriting Sender Addresses for an Entire Domain; 4.13 Masquerading with LDAP; 4.14 Reading the genericstable via LDAP; Chapter 5: Routing Mail; 5.1 Introduction; 5.1 Routing Mail to Special Purpose Mailers; 5.2 Sending Error Messages from the mailertable; 5.3 Disabling MX Processing to Avoid Loops; 5.4 Routing Mai…

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