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Kyle Dent D. - Postfix: The Definitive Guide

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Kyle Dent D. Postfix: The Definitive Guide
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Postfix is a Mail Transfer Agent (MTA): software that mail servers use to route email. Postfix is highly respected by experts for its secure design and tremendous reliability. And new users like it because its so simple to configure. In fact, Postfix has been adopted as the default MTA on Mac OS X. It is also compatible with sendmail, so that existing scripts and programs continue to work seamlessly after it is installed.Postfix was written by well-known security expert Wietse Venema, who reviewed this book intensively during its entire development. Author Kyle Dent covers a wide range of Postfix tasks, from virtual hosting to controls for unsolicited commercial email.While basic configuration of Postfix is easy, every site has unique needs that call for a certain amount of study. This book, with careful background explanations and generous examples, eases readers from the basic configuration to the full power of Postfix. It discusses the Postfix interfaces to various tools that round out a fully scalable and highly secure email system. These tools include POP, IMAP, LDAP, MySQL, Simple Authentication and Security Layer (SASL), and Transport Layer Security (TLS, an upgrade of SSL). A reference section for Postfix configuration parameters and an installation guide are included.Topics include:Basic installation and configuration DNS configuration for email Working with POP/IMAP servers Hosting multiple domains (virtual hosting) Mailing lists Handling unsolicited email (spam blocking) Security through SASL and TLS From compiling and installing Postfix to troubleshooting, Postfix: The Definitive Guide offers system administrators and anyone who deals with Postfix an all-in-one, comprehensive tutorial and reference to this MTA.

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[]
[]
access maps
addresses, email
[See spam]
[See queue manager]
[See also MDAs; MTAs; MUAs]
mailing list
mailing list,
Mailman
virtual alias
append_dot_mydomain parameter
attacks
[See dictionary attacks]
authentication
[See SASL]
[]
blacklisted sites
realtime blacklists
[]
[See Certificate Authority]
classes
client certificates
[See certificates]
command-line tools
commands
common name
[See also building Postfix]
relay (mail delivery agents) control
[See master.cf file]
continuation of lines
Cyrus IMAP
[]
debugging
deferred messages
definitions
delays
[See MDAs]
dictionary attacks
directories
MX records
documentation
[See DNS]
domain names
fully-qualified
domains
[]
email
encoding
errors
host
[]
[See also alias files; aliases]
[]
gateways
groups
[]
header checks
headers
hostnames
[See also DNS]
system
[]
include files
inet sockets
input/output
Internet
Internet Engineering Task Force (IETF)
[See IMAP]
IP addresses
[See DNS]
[]
key/value pairs
[]
line continuation
local delivery
[See LMTP]
local_transport parameter
[See alias files]
[]
[See also email, Internet]
[See MDAs]
mail delivery loops
mail exchangers
[See MTAs]
[See MUAs]
[See message stores POP/IMAP]
[See MLMs]
main.cf
[See regular expressions]
messages, email
[]
names
network email
networks
[]
[See OTP authentication mechanism]
[]
passwords
[See regular expressions]
Perl
plaintext passwords
ports
[See regexp]
[See POP POP/IMAP]
Postfix
processes
pseudo-accounts
[]
[See queue management]
queue scans
[See also (see also queue management; entries under individual queue names]]
[]
recipients
regular expressions
[See also response codes]
rejecting messages
spam
sites
reloading Postfix
remote users
[See response codes]
[See RFCs]
response codes
restrictions
[See POP/IMAP]
[]
[See OTP authentication mechanism]
[See SASL]
[See TLS]
sender
sender addresses
[See MAIL FROM command]
[See SASL authentication]
[See SMTP]
sites
[See blacklisted sites]
size
strict syntax
smtpd_client_restrictions
sockets
[See TLS]
[See strict syntax checking]
strict syntax
strict syntax checking
[See root account]
symlinks
[See strict syntax checking]
system startup
[]
! (exclamation point)
" (quotation marks)
$ (dollar sign)
/ (slash)
[]
[See TLS]
transport types
transports
[]
[See spam]
[See spam]
user accounts
separate domains with virtual accounts
system
users
[See passwords]
[]
variables
viruses
[]
Reviews Reader Reviews Errata Academic Postfix The Definitive Guide - photo 1
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Academic
Postfix: The Definitive Guide
By Kyle D. Dent
Publisher: O'Reilly
Pub Date: December 2003
ISBN: 0-596-00212-2
Pages: 264

Postfix: The Definitive Guide easesreaders from the basic configuration to the full power ofPostfix. It discusses the interfaces to various tools thatround out a fully scalable and highly secure email system.These tools include POP, IMAP, LDAP, MySQL, SimpleAuthentication and Security Layer (SASL), and TransportLayer Security (TLS, an upgrade of SSL). A reference sectionfor Postfix configuration parameters and an installationguide are included.

A.1 Postfix Parameter Reference
bounce_notice_recipient

"2bounce" is one of severalpossible error classes. Each class of error can optionally generatean error notice. 2bounce_notice_recipient designates the recipient address for "2bounce" error notices.

Possible values:

email address

Default:

postmaster

Example:
2bounce_notice_recipient = postmaster
access_map_reject_code

SMTP response code sent when a requestis rejected because of an access map restriction.

Possible values:

reply code

Default:
Example:
access_map_reject_code = 554
alias_maps

List ofalias databases used by the local delivery agent.

Possible values:

alias maps

Default: hash:/etc/aliases, nis

mail.aliases

Example:
alias_maps = hash:/etc/aliases, nis:mail.aliases
allow_mail_to_files

Restricts or allows local maildelivery to external files when expanded from an alias file.

Possible values:

explicit list

Default:

alias,forward

Example:
allow_mail_to_files = alias, forward
allow_percent_hack

The percent hack is an old workaroundthat allowed sender-controlled routing of email messages. Nowadays,DNS and mail routing are much more reliable, but Postfix continues tosupport the hack. To turn off percent rewriting, set allow_percent_hack to no .

Possible values:

yes/no

Default:

yes

Example:
allow_percent_hack = yes
alternate_config_directories

The commands postqueueand postdrop have options to use a differentdirectory when reading the Postfix configuration file. Anynonstandard directories you plan to use must be listed in thisparameter.

Possible values:

directory

Default:

(null)

Example:
alternate_config_directories = /usr/local/postfix/conf
append_at_myorigin

Expands incomplete email addresses byappending the value from myorigin onto addressesthat consist of a local part only. Changes to user@host.example.com .

Possible values:

yes/no

Default:

yes

Example:
append_at_myorigin = yes
authorized_verp_clients

VERP is a technique used with mailinglists to handle bounced messages. It combines the list owner addressand original recipient address with a special delimiter character. authorized_verp_clients contains a list of hostand domain names and IP addresses of clients that are allowed to usethe feature.

Possible values:

hosts/domains

Default:

$mynetworks

Example:
authorized_verp_clients = $mynetworks
berkeley_db_read_buffer_size
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