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<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
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<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<title> Postfix manual - local(8) </title>
</head> <body> <pre>
LOCAL(8) LOCAL(8)
<b>NAME</b>
local - Postfix local mail delivery
<b>SYNOPSIS</b>
<b>local</b> [generic Postfix daemon options]
<b>DESCRIPTION</b>
The <a href="local.8.html"><b>local</b>(8)</a> daemon processes delivery requests from the
Postfix queue manager to deliver mail to local recipients.
Each delivery request specifies a queue file, a sender
address, a domain or host to deliver to, and one or more
recipients. This program expects to be run from the <a href="master.8.html"><b>mas-</b></a>
<a href="master.8.html"><b>ter</b>(8)</a> process manager.
The <a href="local.8.html"><b>local</b>(8)</a> daemon updates queue files and marks recipi-
ents as finished, or it informs the queue manager that
delivery should be tried again at a later time. Delivery
status reports are sent to the <a href="bounce.8.html"><b>bounce</b>(8)</a>, <a href="defer.8.html"><b>defer</b>(8)</a> or
<a href="trace.8.html"><b>trace</b>(8)</a> daemon as appropriate.
<b>CASE FOLDING</b>
All delivery decisions are made using the bare recipient
name (i.e. the address localpart), folded to lower case.
See also under ADDRESS EXTENSION below for a few excep-
tions.
<b>SYSTEM-WIDE AND USER-LEVEL ALIASING</b>
The system administrator can set up one or more system-
wide <b>sendmail</b>-style alias databases. Users can have <b>send-</b>
<b>mail</b>-style ~/.<b>forward</b> files. Mail for <i>name</i> is delivered
to the alias <i>name</i>, to destinations in ~<i>name</i>/.<b>forward</b>, to
the mailbox owned by the user <i>name</i>, or it is sent back as
undeliverable.
The system administrator can specify a comma/space sepa-
rated list of ~/.<b>forward</b> like files through the <b><a href="postconf.5.html#forward_path">for</a>-</b>
<b><a href="postconf.5.html#forward_path">ward_path</a></b> configuration parameter. Upon delivery, the
local delivery agent tries each pathname in the list until
a file is found.
Delivery via ~/.<b>forward</b> files is done with the privileges
of the recipient. Thus, ~/.<b>forward</b> like files must be
readable by the recipient, and their parent directory
needs to have "execute" permission for the recipient.
The <b><a href="postconf.5.html#forward_path">forward_path</a></b> parameter is subject to interpolation of
<b>$user</b> (recipient username), <b>$home</b> (recipient home direc-
tory), <b>$shell</b> (recipient shell), <b>$recipient</b> (complete
recipient address), <b>$extension</b> (recipient address exten-
sion), <b>$domain</b> (recipient domain), <b>$local</b> (entire recipi-
ent address localpart) and <b>$<a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a>.</b> The forms
<i>${name?value}</i> and <i>${name:value}</i> expand conditionally to
<i>value</i> when <i>$name</i> is (is not) defined. Characters that may
have special meaning to the shell or file system are
replaced by underscores. The list of acceptable charac-
ters is specified with the <b><a href="postconf.5.html#forward_expansion_filter">forward_expansion_filter</a></b> con-
figuration parameter.
An alias or ~/.<b>forward</b> file may list any combination of
external commands, destination file names, <b>:include:</b>
directives, or mail addresses. See <a href="aliases.5.html"><b>aliases</b>(5)</a> for a pre-
cise description. Each line in a user's .<b>forward</b> file has
the same syntax as the right-hand part of an alias.
When an address is found in its own alias expansion,
delivery is made to the user instead. When a user is
listed in the user's own ~/.<b>forward</b> file, delivery is made
to the user's mailbox instead. An empty ~/.<b>forward</b> file
means do not forward mail.
In order to prevent the mail system from using up unrea-
sonable amounts of memory, input records read from
<b>:include:</b> or from ~/.<b>forward</b> files are broken up into
chunks of length <b><a href="postconf.5.html#line_length_limit">line_length_limit</a></b>.
While expanding aliases, ~/.<b>forward</b> files, and so on, the
program attempts to avoid duplicate deliveries. The <b><a href="postconf.5.html#duplicate_filter_limit">dupli</a>-</b>
<b><a href="postconf.5.html#duplicate_filter_limit">cate_filter_limit</a></b> configuration parameter limits the num-
ber of remembered recipients.
<b>MAIL FORWARDING</b>
For the sake of reliability, forwarded mail is re-submit-
ted as a new message, so that each recipient has a sepa-
rate on-file delivery status record.
In order to stop mail forwarding loops early, the software
adds an optional <b>Delivered-To:</b> header with the final enve-
lope recipient address. If mail arrives for a recipient
that is already listed in a <b>Delivered-To:</b> header, the mes-
sage is bounced.
<b>MAILBOX DELIVERY</b>
The default per-user mailbox is a file in the UNIX mail
spool directory (<b>/var/mail/</b><i>user</i> or <b>/var/spool/mail/</b><i>user</i>);
the location can be specified with the <b><a href="postconf.5.html#mail_spool_directory">mail_spool_direc</a>-</b>
<b><a href="postconf.5.html#mail_spool_directory">tory</a></b> configuration parameter. Specify a name ending in <b>/</b>
for <b>qmail</b>-compatible <b>maildir</b> delivery.
Alternatively, the per-user mailbox can be a file in the
user's home directory with a name specified via the
<b><a href="postconf.5.html#home_mailbox">home_mailbox</a></b> configuration parameter. Specify a relative
path name. Specify a name ending in <b>/</b> for <b>qmail</b>-compatible
<b>maildir</b> delivery.
Mailbox delivery can be delegated to an external command
specified with the <b><a href="postconf.5.html#mailbox_command_maps">mailbox_command_maps</a></b> and <b><a href="postconf.5.html#mailbox_command">mailbox_com</a>-</b>
<b><a href="postconf.5.html#mailbox_command">mand</a></b> configuration parameters. The command executes with
the privileges of the recipient user (exceptions: sec-
ondary groups are not enabled; in case of delivery as
root, the command executes with the privileges of
<b><a href="postconf.5.html#default_privs">default_privs</a></b>).
Mailbox delivery can be delegated to alternative message
transports specified in the <a href="master.5.html"><b>master.cf</b></a> file. The <b><a href="postconf.5.html#mailbox_transport_maps">mail</a>-</b>
<b><a href="postconf.5.html#mailbox_transport_maps">box_transport_maps</a></b> and <b><a href="postconf.5.html#mailbox_transport">mailbox_transport</a></b> configuration
parameters specify an optional message transport that is
to be used for all local recipients, regardless of whether
they are found in the UNIX passwd database. The <b><a href="postconf.5.html#fallback_transport_maps">fall</a>-</b>
<b><a href="postconf.5.html#fallback_transport_maps">back_transport_maps</a></b> and <b><a href="postconf.5.html#fallback_transport">fallback_transport</a></b> parameters
specify an optional message transport for recipients that
are not found in the <a href="aliases.5.html">aliases(5)</a> or UNIX passwd database.
In the case of UNIX-style mailbox delivery, the <a href="local.8.html"><b>local</b>(8)</a>
daemon prepends a "<b>From</b> <i>sender time</i><b>_</b><i>stamp</i>" envelope header
to each message, prepends an <b>X-Original-To:</b> header with
the recipient address as given to Postfix, prepends an
optional <b>Delivered-To:</b> header with the final envelope
recipient address, prepends a <b>Return-Path:</b> header with the
envelope sender address, prepends a > character to lines
beginning with "<b>From</b> ", and appends an empty line. The
mailbox is locked for exclusive access while delivery is
in progress. In case of problems, an attempt is made to
truncate the mailbox to its original length.
In the case of <b>maildir</b> delivery, the local daemon prepends
an optional <b>Delivered-To:</b> header with the final envelope
recipient address, prepends an <b>X-Original-To:</b> header with
the recipient address as given to Postfix, and prepends a
<b>Return-Path:</b> header with the envelope sender address.
<b>EXTERNAL COMMAND DELIVERY</b>
The <b><a href="postconf.5.html#allow_mail_to_commands">allow_mail_to_commands</a></b> configuration parameter
restricts delivery to external commands. The default set-
ting (<b>alias, forward</b>) forbids command destinations in
<b>:include:</b> files.
Optionally, the process working directory is changed to
the path specified with <b><a href="postconf.5.html#command_execution_directory">command_execution_directory</a></b> (Post-
fix 2.2 and later). Failure to change directory causes
mail to be deferred.
The <b><a href="postconf.5.html#command_execution_directory">command_execution_directory</a></b> parameter value is subject
to interpolation of <b>$user</b> (recipient username), <b>$home</b>
(recipient home directory), <b>$shell</b> (recipient shell),
<b>$recipient</b> (complete recipient address), <b>$extension</b>
(recipient address extension), <b>$domain</b> (recipient domain),
<b>$local</b> (entire recipient address localpart) and <b>$recipi-</b>
<b>ent_delimiter.</b> The forms <i>${name?value}</i> and <i>${name:value}</i>
expand conditionally to <i>value</i> when <i>$name</i> is (is not)
defined. Characters that may have special meaning to the
shell or file system are replaced by underscores. The
list of acceptable characters is specified with the <b><a href="postconf.5.html#execution_directory_expansion_filter">execu</a>-</b>
<b><a href="postconf.5.html#execution_directory_expansion_filter">tion_directory_expansion_filter</a></b> configuration parameter.
The command is executed directly where possible. Assis-
tance by the shell (<b>/bin/sh</b> on UNIX systems) is used only
when the command contains shell magic characters, or when
the command invokes a shell built-in command.
A limited amount of command output (standard output and
standard error) is captured for inclusion with non-deliv-
ery status reports. A command is forcibly terminated if
it does not complete within <b><a href="postconf.5.html#command_time_limit">command_time_limit</a></b> seconds.
Command exit status codes are expected to follow the con-
ventions defined in <<b>sysexits.h</b>>. Exit status 0 means
normal successful completion.
Postfix version 2.3 and later support <a href="http://tools.ietf.org/html/rfc3463">RFC 3463</a>-style
enhanced status codes. If a command terminates with a
non-zero exit status, and the command output begins with
an enhanced status code, this status code takes precedence
over the non-zero exit status.
A limited amount of message context is exported via envi-
ronment variables. Characters that may have special mean-
ing to the shell are replaced by underscores. The list of
acceptable characters is specified with the <b><a href="postconf.5.html#command_expansion_filter">command_expan</a>-</b>
<b><a href="postconf.5.html#command_expansion_filter">sion_filter</a></b> configuration parameter.
<b>SHELL</b> The recipient user's login shell.
<b>HOME</b> The recipient user's home directory.
<b>USER</b> The bare recipient name.
<b>EXTENSION</b>
The optional recipient address extension.
<b>DOMAIN</b> The recipient address domain part.
<b>LOGNAME</b>
The bare recipient name.
<b>LOCAL</b> The entire recipient address localpart (text to the
left of the rightmost @ character).
<b>ORIGINAL_RECIPIENT</b>
The entire recipient address, before any address
rewriting or aliasing (Postfix 2.5 and later).
<b>RECIPIENT</b>
The entire recipient address.
<b>SENDER</b> The entire sender address.
Additional remote client information is made available via
the following environment variables:
<b>CLIENT_ADDRESS</b>
Remote client network address. Available as of
Postfix 2.2.
<b>CLIENT_HELO</b>
Remote client EHLO command parameter. Available as
of Postfix 2.2.
<b>CLIENT_HOSTNAME</b>
Remote client hostname. Available as of Postfix
2.2.
<b>CLIENT_PROTOCOL</b>
Remote client protocol. Available as of Postfix
2.2.
<b>SASL_METHOD</b>
SASL authentication method specified in the remote
client AUTH command. Available as of Postfix 2.2.
<b>SASL_SENDER</b>
SASL sender address specified in the remote client
MAIL FROM command. Available as of Postfix 2.2.
<b>SASL_USERNAME</b>
SASL username specified in the remote client AUTH
command. Available as of Postfix 2.2.
The <b>PATH</b> environment variable is always reset to a system-
dependent default path, and environment variables whose
names are blessed by the <b><a href="postconf.5.html#export_environment">export_environment</a></b> configuration
parameter are exported unchanged.
The current working directory is the mail queue directory.
The <a href="local.8.html"><b>local</b>(8)</a> daemon prepends a "<b>From</b> <i>sender time</i><b>_</b><i>stamp</i>"
envelope header to each message, prepends an <b>X-Original-</b>
<b>To:</b> header with the recipient address as given to Postfix,
prepends an optional <b>Delivered-To:</b> header with the final
recipient envelope address, prepends a <b>Return-Path:</b> header
with the sender envelope address, and appends no empty
line.
<b>EXTERNAL FILE DELIVERY</b>
The delivery format depends on the destination filename
syntax. The default is to use UNIX-style mailbox format.
Specify a name ending in <b>/</b> for <b>qmail</b>-compatible <b>maildir</b>
delivery.
The <b><a href="postconf.5.html#allow_mail_to_files">allow_mail_to_files</a></b> configuration parameter restricts
delivery to external files. The default setting (<b>alias,</b>
<b>forward</b>) forbids file destinations in <b>:include:</b> files.
In the case of UNIX-style mailbox delivery, the <a href="local.8.html"><b>local</b>(8)</a>
daemon prepends a "<b>From</b> <i>sender time</i><b>_</b><i>stamp</i>" envelope header
to each message, prepends an <b>X-Original-To:</b> header with
the recipient address as given to Postfix, prepends an
optional <b>Delivered-To:</b> header with the final recipient
envelope address, prepends a > character to lines begin-
ning with "<b>From</b> ", and appends an empty line. The enve-
lope sender address is available in the <b>Return-Path:</b>
header. When the destination is a regular file, it is
locked for exclusive access while delivery is in progress.
In case of problems, an attempt is made to truncate a reg-
ular file to its original length.
In the case of <b>maildir</b> delivery, the local daemon prepends
an optional <b>Delivered-To:</b> header with the final envelope
recipient address, and prepends an <b>X-Original-To:</b> header
with the recipient address as given to Postfix. The enve-
lope sender address is available in the <b>Return-Path:</b>
header.
<b>ADDRESS EXTENSION</b>
The optional <b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a></b> configuration parameter
specifies how to separate address extensions from local
recipient names.
For example, with "<b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> = +</b>", mail for
<i>name</i>+<i>foo</i> is delivered to the alias <i>name</i>+<i>foo</i> or to the
alias <i>name</i>, to the destinations listed in ~<i>name</i>/.<b>for-</b>
<b>ward</b>+<i>foo</i> or in ~<i>name</i>/.<b>forward</b>, to the mailbox owned by the
user <i>name</i>, or it is sent back as undeliverable.
<b>DELIVERY RIGHTS</b>
Deliveries to external files and external commands are
made with the rights of the receiving user on whose behalf
the delivery is made. In the absence of a user context,
the <a href="local.8.html"><b>local</b>(8)</a> daemon uses the owner rights of the <b>:include:</b>
file or alias database. When those files are owned by the
superuser, delivery is made with the rights specified with
the <b><a href="postconf.5.html#default_privs">default_privs</a></b> configuration parameter.
<b>STANDARDS</b>
<a href="http://tools.ietf.org/html/rfc822">RFC 822</a> (ARPA Internet Text Messages)
<a href="http://tools.ietf.org/html/rfc3463">RFC 3463</a> (Enhanced status codes)
<b>DIAGNOSTICS</b>
Problems and transactions are logged to <b>syslogd</b>(8). Cor-
rupted message files are marked so that the queue manager
can move them to the <b>corrupt</b> queue afterwards.
Depending on the setting of the <b><a href="postconf.5.html#notify_classes">notify_classes</a></b> parameter,
the postmaster is notified of bounces and of other trou-
ble.
<b>SECURITY</b>
The <a href="local.8.html"><b>local</b>(8)</a> delivery agent needs a dual personality 1) to
access the private Postfix queue and IPC mechanisms, 2) to
impersonate the recipient and deliver to recipient-speci-
fied files or commands. It is therefore security sensi-
tive.
The <a href="local.8.html"><b>local</b>(8)</a> delivery agent disallows regular expression
substitution of $1 etc. in <b><a href="postconf.5.html#alias_maps">alias_maps</a></b>, because that would
open a security hole.
The <a href="local.8.html"><b>local</b>(8)</a> delivery agent will silently ignore requests
to use the <a href="proxymap.8.html"><b>proxymap</b>(8)</a> server within <b><a href="postconf.5.html#alias_maps">alias_maps</a></b>. Instead
it will open the table directly. Before Postfix version
2.2, the <a href="local.8.html"><b>local</b>(8)</a> delivery agent will terminate with a
fatal error.
<b>BUGS</b>
For security reasons, the message delivery status of
external commands or of external files is never check-
pointed to file. As a result, the program may occasionally
deliver more than once to a command or external file. Bet-
ter safe than sorry.
Mutually-recursive aliases or ~/.<b>forward</b> files are not
detected early. The resulting mail forwarding loop is
broken by the use of the <b>Delivered-To:</b> message header.
<b>CONFIGURATION PARAMETERS</b>
Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically, as
<a href="local.8.html"><b>local</b>(8)</a> processes run for only a limited amount of time.
Use the command "<b>postfix reload</b>" to speed up a change.
The text below provides only a parameter summary. See
<a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including examples.
<b>COMPATIBILITY CONTROLS</b>
<b><a href="postconf.5.html#biff">biff</a> (yes)</b>
Whether or not to use the local <a href="postconf.5.html#biff">biff</a> service.
<b><a href="postconf.5.html#expand_owner_alias">expand_owner_alias</a> (no)</b>
When delivering to an alias "aliasname" that has an
"owner-aliasname" companion alias, set the envelope
sender address to the expansion of the "owner-
aliasname" alias.
<b><a href="postconf.5.html#owner_request_special">owner_request_special</a> (yes)</b>
Give special treatment to owner-listname and list-
name-request address localparts: don't split such
addresses when the <a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> is set to
"-".
<b><a href="postconf.5.html#sun_mailtool_compatibility">sun_mailtool_compatibility</a> (no)</b>
Obsolete SUN mailtool compatibility feature.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#frozen_delivered_to">frozen_delivered_to</a> (yes)</b>
Update the <a href="local.8.html"><b>local</b>(8)</a> delivery agent's idea of the
Delivered-To: address (see prepend_deliv-
ered_header) only once, at the start of a delivery
attempt; do not update the Delivered-To: address
while expanding aliases or .forward files.
Available in Postfix version 2.5.3 and later:
<b><a href="postconf.5.html#strict_mailbox_ownership">strict_mailbox_ownership</a> (yes)</b>
Defer delivery when a mailbox file is not owned by
its recipient.
<b><a href="postconf.5.html#reset_owner_alias">reset_owner_alias</a> (no)</b>
Reset the <a href="local.8.html"><b>local</b>(8)</a> delivery agent's idea of the
owner-alias attribute, when delivering mail to a
child alias that does not have its own owner alias.
<b>DELIVERY METHOD CONTROLS</b>
The precedence of <a href="local.8.html"><b>local</b>(8)</a> delivery methods from high to
low is: aliases, .forward files, <a href="postconf.5.html#mailbox_transport_maps">mailbox_transport_maps</a>,
<a href="postconf.5.html#mailbox_transport">mailbox_transport</a>, <a href="postconf.5.html#mailbox_command_maps">mailbox_command_maps</a>, <a href="postconf.5.html#mailbox_command">mailbox_command</a>,
<a href="postconf.5.html#home_mailbox">home_mailbox</a>, <a href="postconf.5.html#mail_spool_directory">mail_spool_directory</a>, fallback_trans-
port_maps, <a href="postconf.5.html#fallback_transport">fallback_transport</a>, and <a href="postconf.5.html#luser_relay">luser_relay</a>.
<b><a href="postconf.5.html#alias_maps">alias_maps</a> (see 'postconf -d' output)</b>
The alias databases that are used for <a href="local.8.html"><b>local</b>(8)</a>
delivery.
<b><a href="postconf.5.html#forward_path">forward_path</a> (see 'postconf -d' output)</b>
The <a href="local.8.html"><b>local</b>(8)</a> delivery agent search list for finding
a .forward file with user-specified delivery meth-
ods.
<b><a href="postconf.5.html#mailbox_transport_maps">mailbox_transport_maps</a> (empty)</b>
Optional lookup tables with per-recipient message
delivery transports to use for <a href="local.8.html"><b>local</b>(8)</a> mailbox
delivery, whether or not the recipients are found
in the UNIX passwd database.
<b><a href="postconf.5.html#mailbox_transport">mailbox_transport</a> (empty)</b>
Optional message delivery transport that the
<a href="local.8.html"><b>local</b>(8)</a> delivery agent should use for mailbox
delivery to all local recipients, whether or not
they are found in the UNIX passwd database.
<b><a href="postconf.5.html#mailbox_command_maps">mailbox_command_maps</a> (empty)</b>
Optional lookup tables with per-recipient external
commands to use for <a href="local.8.html"><b>local</b>(8)</a> mailbox delivery.
<b><a href="postconf.5.html#mailbox_command">mailbox_command</a> (empty)</b>
Optional external command that the <a href="local.8.html"><b>local</b>(8)</a> deliv-
ery agent should use for mailbox delivery.
<b><a href="postconf.5.html#home_mailbox">home_mailbox</a> (empty)</b>
Optional pathname of a mailbox file relative to a
<a href="local.8.html"><b>local</b>(8)</a> user's home directory.
<b><a href="postconf.5.html#mail_spool_directory">mail_spool_directory</a> (see 'postconf -d' output)</b>
The directory where <a href="local.8.html"><b>local</b>(8)</a> UNIX-style mailboxes
are kept.
<b><a href="postconf.5.html#fallback_transport_maps">fallback_transport_maps</a> (empty)</b>
Optional lookup tables with per-recipient message
delivery transports for recipients that the
<a href="local.8.html"><b>local</b>(8)</a> delivery agent could not find in the
<a href="aliases.5.html"><b>aliases</b>(5)</a> or UNIX password database.
<b><a href="postconf.5.html#fallback_transport">fallback_transport</a> (empty)</b>
Optional message delivery transport that the
<a href="local.8.html"><b>local</b>(8)</a> delivery agent should use for names that
are not found in the <a href="aliases.5.html"><b>aliases</b>(5)</a> or UNIX password
database.
<b><a href="postconf.5.html#luser_relay">luser_relay</a> (empty)</b>
Optional catch-all destination for unknown <a href="local.8.html"><b>local</b>(8)</a>
recipients.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#command_execution_directory">command_execution_directory</a> (empty)</b>
The <a href="local.8.html"><b>local</b>(8)</a> delivery agent working directory for
delivery to external command.
<b>MAILBOX LOCKING CONTROLS</b>
<b><a href="postconf.5.html#deliver_lock_attempts">deliver_lock_attempts</a> (20)</b>
The maximal number of attempts to acquire an exclu-
sive lock on a mailbox file or <a href="bounce.8.html"><b>bounce</b>(8)</a> logfile.
<b><a href="postconf.5.html#deliver_lock_delay">deliver_lock_delay</a> (1s)</b>
The time between attempts to acquire an exclusive
lock on a mailbox file or <a href="bounce.8.html"><b>bounce</b>(8)</a> logfile.
<b><a href="postconf.5.html#stale_lock_time">stale_lock_time</a> (500s)</b>
The time after which a stale exclusive mailbox
lockfile is removed.
<b><a href="postconf.5.html#mailbox_delivery_lock">mailbox_delivery_lock</a> (see 'postconf -d' output)</b>
How to lock a UNIX-style <a href="local.8.html"><b>local</b>(8)</a> mailbox before
attempting delivery.
<b>RESOURCE AND RATE CONTROLS</b>
<b><a href="postconf.5.html#command_time_limit">command_time_limit</a> (1000s)</b>
Time limit for delivery to external commands.
<b><a href="postconf.5.html#duplicate_filter_limit">duplicate_filter_limit</a> (1000)</b>
The maximal number of addresses remembered by the
address duplicate filter for <a href="aliases.5.html"><b>aliases</b>(5)</a> or <a href="virtual.5.html"><b>vir-</b></a>
<a href="virtual.5.html"><b>tual</b>(5)</a> alias expansion, or for <a href="showq.8.html"><b>showq</b>(8)</a> queue dis-
plays.
<b><a href="postconf.5.html#local_destination_concurrency_limit">local_destination_concurrency_limit</a> (2)</b>
The maximal number of parallel deliveries via the
local mail delivery transport to the same recipient
(when "<a href="postconf.5.html#local_destination_recipient_limit">local_destination_recipient_limit</a> = 1") or
the maximal number of parallel deliveries to the
same <a href="ADDRESS_CLASS_README.html#local_domain_class">local domain</a> (when "local_destination_recipi-
ent_limit > 1").
<b><a href="postconf.5.html#local_destination_recipient_limit">local_destination_recipient_limit</a> (1)</b>
The maximal number of recipients per message deliv-
ery via the local mail delivery transport.
<b><a href="postconf.5.html#mailbox_size_limit">mailbox_size_limit</a> (51200000)</b>
The maximal size of any <a href="local.8.html"><b>local</b>(8)</a> individual mailbox
or maildir file, or zero (no limit).
<b>SECURITY CONTROLS</b>
<b><a href="postconf.5.html#allow_mail_to_commands">allow_mail_to_commands</a> (alias, forward)</b>
Restrict <a href="local.8.html"><b>local</b>(8)</a> mail delivery to external com-
mands.
<b><a href="postconf.5.html#allow_mail_to_files">allow_mail_to_files</a> (alias, forward)</b>
Restrict <a href="local.8.html"><b>local</b>(8)</a> mail delivery to external files.
<b><a href="postconf.5.html#command_expansion_filter">command_expansion_filter</a> (see 'postconf -d' output)</b>
Restrict the characters that the <a href="local.8.html"><b>local</b>(8)</a> delivery
agent allows in $name expansions of $<a href="postconf.5.html#mailbox_command">mailbox_com</a>-
<a href="postconf.5.html#mailbox_command">mand</a> and $<a href="postconf.5.html#command_execution_directory">command_execution_directory</a>.
<b><a href="postconf.5.html#default_privs">default_privs</a> (nobody)</b>
The default rights used by the <a href="local.8.html"><b>local</b>(8)</a> delivery
agent for delivery to external file or command.
<b><a href="postconf.5.html#forward_expansion_filter">forward_expansion_filter</a> (see 'postconf -d' output)</b>
Restrict the characters that the <a href="local.8.html"><b>local</b>(8)</a> delivery
agent allows in $name expansions of $<a href="postconf.5.html#forward_path">forward_path</a>.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#execution_directory_expansion_filter">execution_directory_expansion_filter</a> (see 'postconf -d'</b>
<b>output)</b>
Restrict the characters that the <a href="local.8.html"><b>local</b>(8)</a> delivery
agent allows in $name expansions of $<a href="postconf.5.html#command_execution_directory">command_execu</a>-
<a href="postconf.5.html#command_execution_directory">tion_directory</a>.
Available in Postfix version 2.5.3 and later:
<b><a href="postconf.5.html#strict_mailbox_ownership">strict_mailbox_ownership</a> (yes)</b>
Defer delivery when a mailbox file is not owned by
its recipient.
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
The default location of the Postfix <a href="postconf.5.html">main.cf</a> and
<a href="master.5.html">master.cf</a> configuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
How much time a Postfix daemon process may take to
handle a request before it is terminated by a
built-in watchdog timer.
<b><a href="postconf.5.html#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b>
The maximal number of digits after the decimal
point when logging sub-second delay values.
<b><a href="postconf.5.html#export_environment">export_environment</a> (see 'postconf -d' output)</b>
The list of environment variables that a Postfix
process will export to non-Postfix processes.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
The time limit for sending or receiving information
over an internal communication channel.
<b><a href="postconf.5.html#local_command_shell">local_command_shell</a> (empty)</b>
Optional shell program for <a href="local.8.html"><b>local</b>(8)</a> delivery to
non-Postfix command.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
The maximum amount of time that an idle Postfix
daemon process waits for an incoming connection
before terminating voluntarily.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The maximal number of incoming connections that a
Postfix daemon process will service before termi-
nating voluntarily.
<b><a href="postconf.5.html#prepend_delivered_header">prepend_delivered_header</a> (command, file, forward)</b>
The message delivery contexts where the Postfix
<a href="local.8.html"><b>local</b>(8)</a> delivery agent prepends a Delivered-To:
message header with the address that the mail was
delivered to.
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
The process ID of a Postfix command or daemon
process.
<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
The process name of a Postfix command or daemon
process.
<b><a href="postconf.5.html#propagate_unmatched_extensions">propagate_unmatched_extensions</a> (canonical, virtual)</b>
What address lookup tables copy an address exten-
sion from the lookup key to the lookup result.
<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
The location of the Postfix top-level queue direc-
tory.
<b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> (empty)</b>
The separator between user names and address exten-
sions (user+foo).
<b><a href="postconf.5.html#require_home_directory">require_home_directory</a> (no)</b>
Require that a <a href="local.8.html"><b>local</b>(8)</a> recipient's home directory
exists before mail delivery is attempted.
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
The mail system name that is prepended to the
process name in syslog records, so that "smtpd"
becomes, for example, "postfix/smtpd".
<b>FILES</b>
The following are examples; details differ between systems.
$HOME/.forward, per-user aliasing
/etc/aliases, system-wide alias database
/var/spool/mail, system mailboxes
<b>SEE ALSO</b>
<a href="qmgr.8.html">qmgr(8)</a>, queue manager
<a href="bounce.8.html">bounce(8)</a>, delivery status reports
<a href="newaliases.1.html">newaliases(1)</a>, create/update alias database
<a href="postalias.1.html">postalias(1)</a>, create/update alias database
<a href="aliases.5.html">aliases(5)</a>, format of alias database
<a href="postconf.5.html">postconf(5)</a>, configuration parameters
<a href="master.5.html">master(5)</a>, generic daemon options
syslogd(8), system logging
<b>LICENSE</b>
The Secure Mailer license must be distributed with this
software.
<b>HISTORY</b>
The <b>Delivered-To:</b> message header appears in the <b>qmail</b> sys-
tem by Daniel Bernstein.
The <i>maildir</i> structure appears in the <b>qmail</b> system by
Daniel Bernstein.
<b>AUTHOR(S)</b>
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
LOCAL(8)
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