Book Image

Qmail Quickstarter: Install, Set Up and Run your own Email Server

Book Image

Qmail Quickstarter: Install, Set Up and Run your own Email Server

Overview of this book

This book starts with setting up a qmail server and takes you through virtualization, filtering, and other advanced features like hosting multiple domains, mailing lists, and SSL Encryption. Finally, it discusses the log files and how to make qmail work faster. Qmail is a secure, reliable, efficient, simple message transfer agent. It is designed for typical Internet-connected UNIX hosts. Qmail is the second most common SMTP server on the Internet, and has by far the fastest growth of any SMTP server. Qmail's straight-paper-path philosophy guarantees that a message, once accepted into the system, will never be lost. Qmail also optionally supports maildir, a new, super-reliable user mailbox format.

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Qmail Quickstarter: Install, Set Up and Run your own Email Server
Jun, 2007 | 152 pages
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Table of Contents (13 chapters)
Qmail Quickstarter
Qmail Quickstarter
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
Preface
Preface
Free Chapter
1
Basic Qmail
Basic Qmail
The Minimum Qmail System
Administrative Conveniences
The Overall Structure of Qmail
Summary
2
Getting Email into the Queue
Getting Email into the Queue
qmail-queue and the Qmail Queue
The qmail-inject and sendmail Interfaces
qmail-smtpd and the QMAILQUEUE Patch
Other Mail Protocols
Summary
3
Getting Email Out of the Queue
Getting Email Out of the Queue
qmail-send and the Qmail Queue
Delivering Email Locally
Users
Delivering Email Remotely
Summary
4
Storing and Retrieving Email
Storing and Retrieving Email
Popular Storage Formats
The POP3 and IMAP Protocols
Webmail
Summary
5
Virtualization
Virtualization
Generic Virtualization Framework
User-Management Problem in Assisted Virtual Domains
Good Reasons to Use Multiple Installations
Summary
6
Filtering
Filtering
Basic Filtering Architecture
Sending Mail Without a Queue
Blocking Viruses
Stopping Spam from Getting In
Stopping Spam from Getting Out
Summary
7
Advanced Features
Advanced Features
SSL Encryption
Mailing Lists
Summary
8
Administration, Optimization, and Monitoring
Administration, Optimization, and Monitoring
The Log Files
Basic Analysis
Making It Faster
Summary

The qmail-inject and sendmail Interfaces

The sendmail program and the qmail-inject program are convenient ways of sending mail from a program running on the same computer as the qmail server.

Of the two, qmail-inject is the more basic one. Its simplest invocation, sending an email that is stored in a file named message, can be done as follows:

qmail-inject <message

Part of the simplicity of this is that qmail-inject expects the input file to be a correctly formatted email message, complete with correctly formatted headers. The headers may be used as a last resort to guess the envelope recipients (qmail-inject searches for To:, Cc:, Bcc:, Apparently-To:, Resent-To:, Resent-Cc:, and Resent-Bcc: headers, in that order) and the envelope sender (qmail-inject searches for Sender:, From:, Reply-To:, Return-Path:, Return-Receipt-To:, Errors-To:, Resent-Sender:, Resent-From:, and Resent-Reply-To: headers, in that order). However, it is better to specify the envelope information with the command...

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