<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <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>master</b>(8)</a> process manager. The <a href="local.8.html"><b>local</b>(8)</a> daemon updates queue files and marks recipients as fin- ished, 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 exceptions. <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>sendmail</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 separated list of ~/.<b>forward</b> like files through the <b><a href="postconf.5.html#forward_path">forward_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 recip- ient. 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>$user</b> (recip- ient username), <b>$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>$local</b> (entire recipi- ent address localpart) and <b>$<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 characters is specified with the <b><a href="postconf.5.html#forward_expansion_filter">forward_expansion_filter</a></b> configuration parameter. An alias or ~/.<b>forward</b> file may list any combination of external com- mands, destination file names, <b>:include:</b> directives, or mail addresses. See <a href="aliases.5.html"><b>aliases</b>(5)</a> for a precise description. Each line in a user's .<b>for-</b> <b>ward</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>for-</b> <b>ward</b> file means do not forward mail. In order to prevent the mail system from using up unreasonable 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">duplicate_filter_limit</a></b> con- figuration parameter limits the number of remembered recipients. <b>MAIL FORWARDING</b> For the sake of reliability, forwarded mail is re-submitted as a new message, so that each recipient has a separate 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 envelope recipient address. If mail arrives for a recipient that is already listed in a <b>Delivered-To:</b> header, the message 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_directory</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_command</a></b> configuration parameters. The command executes with the privileges of the recipient user (excep- tions: secondary 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">mailbox_transport_maps</a></b> and <b><a href="postconf.5.html#mailbox_transport">mail</a>-</b> <b><a href="postconf.5.html#mailbox_transport">box_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 exclu- sive 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 setting (<b>alias, forward</b>) forbids com- mand destinations in <b>:include:</b> files. Optionally, the process working directory is changed to the path speci- fied with <b><a href="postconf.5.html#command_execution_directory">command_execution_directory</a></b> (Postfix 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 interpo- lation 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>$<a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a>.</b> The forms <i>${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 mean- ing 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">execution_direc</a>-</b> <b><a href="postconf.5.html#execution_directory_expansion_filter">tory_expansion_filter</a></b> configuration parameter. The command is executed directly where possible. Assistance 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-delivery status reports. A command is forcibly terminated if it does not complete within <b>com-</b> <b>mand_time_limit</b> seconds. Command exit status codes are expected to follow the conventions 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 environment vari- ables. Characters that may have special meaning to the shell are replaced by underscores. The list of acceptable characters is speci- fied with the <b><a href="postconf.5.html#command_expansion_filter">command_expansion_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 follow- ing 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-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, forward</b>) forbids file des- tinations 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 beginning with "<b>From</b> ", and appends an empty line. The envelope 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 regular 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 envelope sender address is available in the <b>Return-</b> <b>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 destina- tions listed in ~<i>name</i>/.<b>forward</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). Corrupted 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 postmas- ter is notified of bounces and of other trouble. <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 recipi- ent and deliver to recipient-specified files or commands. It is there- fore security sensitive. 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 checkpointed to file. As a result, the program may occasionally deliver more than once to a command or exter- nal file. Better 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>Deliv-</b> <b>ered-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 listname-request address localparts: don't split such addresses when the <a href="postconf.5.html#recipient_delimiter">recipi</a>- <a href="postconf.5.html#recipient_delimiter">ent_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 <a href="postconf.5.html#prepend_delivered_header">prepend_delivered_header</a>) 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 recipi- ent. <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_direc</a>- <a href="postconf.5.html#mail_spool_directory">tory</a>, <a href="postconf.5.html#fallback_transport_maps">fallback_transport_maps</a>, <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 methods. <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> delivery 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 exclusive 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 dupli- cate filter for <a href="aliases.5.html"><b>aliases</b>(5)</a> or <a href="virtual.5.html"><b>virtual</b>(5)</a> alias expansion, or for <a href="showq.8.html"><b>showq</b>(8)</a> queue displays. <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_destina</a>- <a href="postconf.5.html#local_destination_recipient_limit">tion_recipient_limit</a> = 1") or the maximal number of parallel deliveries to the same local domain (when "<a href="postconf.5.html#local_destination_recipient_limit">local_destina</a>- <a href="postconf.5.html#local_destination_recipient_limit">tion_recipient_limit</a> > 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 delivery 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 commands. <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_command</a> and $<a href="postconf.5.html#command_execution_directory">command_execu</a>- <a href="postconf.5.html#command_execution_directory">tion_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' 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_execution_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 recipi- ent. <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> con- figuration 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 log- ging 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 com- mand. <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 terminating 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> deliv- ery 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 extension 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 directory. <b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> (empty)</b> The set of characters that can separate a user name from its extension (example: user+foo), or a .forward file name from its extension (example: .forward+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, "post- fix/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> system 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) </pre> </body> </html>