An Introduction to Qmail

By: Dave Sill

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Paperback | 1 September 2003

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524 Pages

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23.5 x 18.42 x 3.18

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THIS BOOK DOCUMENTS HOW to install, configure, and use qmail. It will be most bene- ficial to system, network, and mail administrators, but it will also be helpful to users who want to read and send e-mail more effectively. What Can VOU Expect to Learn from This Book? You can expect to learn the following: - What qmail is, what it can da, and what it cant da - How to in stall and configure a basic qmail server, including various sup- port utilities - How to use qmail as a regular user: controlling the disposition of incoming messages, formatting outgoing messages, and working with mailboxes in multiple formats - How to manage a qmail server: setting up aliases, users, virtual domains, and mailing lists; troubleshooting; performance tuning; and controlling junk mail and other abuse - How qmail works: not just what it does, but how it da es it Organization Chapter 1, "Introducing qmail," describes qmail and its features. Read it ifyou're not sure exactly what qmail is or what it can do for you. It also describes the over- all organization of the qmail suite, compares qmail to other Unix mailers, and lists other sources of qmail information and support. Chapter 2, "Installing qmail," describes step-by-step the installation of qmail on a wide range of operating system distributions, including commercial Unix variants, Linux, and various Berkeley Software Distributions (BSDs). Chapter 3, "Configuring qmail: The Basics," shows how to configure qmail for a variety of basic functions.

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You Can Find This Book In

Non-Fiction Computing & I.T.Computer Networking & Communications Electronic Mail or Email for Professionals Client-Server Networking Digital Lifestyle & Online World: Consumer & User Guides Internet Guides & Online Services Computer Programming & Software Development Software Engineering Computer Hardware Servers Information Technology General Issue

Programming & Scripting Languages Databases Data Capture & Analysis Business Applications

Acknowledgments	p. xiii
About the Author	p. xv
About the Technical Reviewer	p. xvii
Introduction	p. xix
Introducing qmail	p. 1
Overview	p. 2
What Is qmail?	p. 2
Why Use qmail?	p. 3
Why Not Use qmail?	p. 9
Qmail Features	p. 12
History	p. 15
Architecture	p. 16
License	p. 19
Documentation	p. 20
Support	p. 23
Conclusion	p. 25
Installing qmail	p. 27
Overview	p. 27
Preparing to Install qmail	p. 28
Installing qmail: Quick-Start Instructions	p. 38
Installing qmail Step by Step	p. 52
An Overview of the Finished Product	p. 86
Installing from RPMs	p. 87
Conclusion	p. 91
Configuring qmail: The Basics	p. 93
Overview	p. 93
Control Files Reference	p. 93
Relaying	p. 110
Multiple Host Names	p. 115
Virtual Domains	p. 115
Aliases	p. 116
The qmail-users Mechanism	p. 117
Conclusion	p. 119
Using qmail	p. 121
Overview	p. 121
Sending Messages	p. 121
Receiving Messages	p. 136
User Utilities	p. 148
Conclusion	p. 156
Managing qmail	p. 159
Overview	p. 159
Understanding the qmailctl Script	p. 159
Learning qmail's Management Commands	p. 165
Managing the Queue	p. 187
Conclusion	p. 198
Troubleshooting qmail	p. 199
Overview	p. 199
Process Monitoring	p. 200
Understanding Logs	p. 201
Using Message Headers	p. 211
Testing	p. 217
Fixing Common Problems	p. 218
Conclusion	p. 223
Configuring qmail: Advanced Options	p. 225
Overview	p. 225
Setting Up Typical Configurations	p. 226
Migrating from Sendmail to qmail	p. 237
Modifying the Source Code	p. 249
Using Quick Mail Transfer Protocol	p. 254
Using Quick Mail Queuing Protocol	p. 258
Securing SMTP	p. 264
Performance Tuning	p. 273
Conclusion	p. 284
Controlling Junk Mail	p. 285
Overview	p. 286
An Ounce of Prevention	p. 286
Setting System-Level Controls	p. 287
Setting User-Level Controls	p. 292
Conclusion	p. 294
Managing Mailing Lists	p. 295
Overview	p. 295
Setting Up Simple Mailing Lists	p. 295
Working with ezmlm	p. 297
Working with Majordomo	p. 305
Working with Mailman	p. 315
Using Other MLMs	p. 324
Conclusion	p. 326
Serving Mailboxes	p. 327
Overview	p. 328
Installing and Using POP3 Servers	p. 328
Installing and Using IMAP Servers	p. 344
Securing POP3	p. 353
Securing IMAP	p. 362
Retrieving Mail with POP3 and IMAP	p. 369
Conclusion	p. 374
Hosting Virtual Domain and Users	p. 375
Overview	p. 376
Choosing between VMailMgr and Vpopmail	p. 376
Using VMailMgr	p. 377
Using Vpopmail	p. 383
Conclusion	p. 389
Understanding Advanced Topics	p. 391
Overview	p. 391
Single-Recipient Delivery vs. Multiple-Recipient Delivery	p. 391
Using Variable Envelope Return Paths	p. 394
Configuring Scalable Servers	p. 395
Using Lightweight Directory Access Protocol	p. 401
Using Structured Query Language	p. 402
Virus Scanning	p. 403
Conclusion	p. 414
How qmail Works	p. 417
High-Level Overview	p. 417
Receiving Modules	p. 418
Sending Modules	p. 425
Related Packages	p. 431
checkpassword	p. 431
Courier-IMAP	p. 432
daemontools	p. 432
djbdns	p. 432
dot-forward	p. 433
ezmlm	p. 433
ezmlm-idx	p. 433
fastforward	p. 434
getmail	p. 434
maildrop	p. 434
mess822	p. 435
oMail-webmail	p. 435
oSpam	p. 435
qlogtools	p. 436
qmail-autoresponder	p. 436
qmail-qfilter	p. 436
qmail-Scanner	p. 437
qmail-vacation	p. 437
qmailanalog	p. 437
safecat	p. 439
serialmail	p. 439
SqWebMail	p. 440
syncdir	p. 440
TMDA	p. 440
ucspi-tcp	p. 441
VMailMgr	p. 441
Vpopmail	p. 441
How Internet Mail Works	p. 443
How a Message Gets from Point A to Point B	p. 443
Envelopes vs. Headers	p. 444
Finding More Information	p. 446
qmail Features	p. 449
Setup Features	p. 449
Security Features	p. 449
Message Construction	p. 450
SMTP Service	p. 450
Queue Management	p. 451
Bounces	p. 452
Routing by Domain	p. 453
SMTP Delivery	p. 453
Forwarding and Mailing Lists	p. 454
Local Delivery	p. 454
POP3 Service	p. 455
Error Messages	p. 457
Interactive Error Messages	p. 457
Log Messages	p. 457
Bounce Messages	p. 459
Gotchas	p. 465
qmail Doesn't Deliver to Superusers	p. 465
qmail Doesn't Deliver to Users Who Don't Own Their Home Directory	p. 465
qmail Doesn't Deliver to Users Whose Usernames Contain Uppercase Letters	p. 465
qmail Replaces Dots (.) in Extension Addresses with Colons (:)	p. 466
qmail Converts Uppercase Characters in Extension Addresses to Lowercase	p. 466
qmail Doesn't Use /etc/hosts	p. 466
qmail Doesn't Log SMTP Activity	p. 466
qmail Doesn't Generate Deferral Notices	p. 467
qmail Is Slow If trigger Is Wrong	p. 467
DNS or IDENT Lookups Can Make SMTP Slow	p. 467
qmail-smtpd Accepts Mail for All Recipients	p. 467
qmail-smtpd Doesn't Automatically Relay for the Local Host	p. 468
Table of Contents provided by Syndetics. All Rights Reserved.

An Introduction to Qmail

At a Glance

Paperback

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How to return your order

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