Postfix manual - local(8)

From a848231ae0f346dc7cc000973fbeb65b0894ee92 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 21:59:03 +0200 Subject: Adding upstream version 3.8.5. Signed-off-by: Daniel Baumann --- html/local.8.html | 630 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 630 insertions(+) create mode 100644 html/local.8.html (limited to 'html/local.8.html') diff --git a/html/local.8.html b/html/local.8.html new file mode 100644 index 0000000..fce3d04 --- /dev/null +++ b/html/local.8.html @@ -0,0 +1,630 @@ + + + + + Postfix manual - local(8) +
+LOCAL(8)                                                              LOCAL(8)
+
+NAME
+       local - Postfix local mail delivery
+
+SYNOPSIS
+       local [generic Postfix daemon options]
+
+DESCRIPTION
+       The  local(8) 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 master(8) process manager.
+
+       The  local(8)  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
+       bounce(8), defer(8) or trace(8) daemon as appropriate.
+
+CASE FOLDING
+       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.
+
+SYSTEM-WIDE AND USER-LEVEL ALIASING
+       The system administrator can set  up  one  or  more  system-wide  send-
+       mail-style  alias  databases.  Users can have sendmail-style ~/.forward
+       files.  Mail for name is delivered to the alias name,  to  destinations
+       in ~name/.forward, to the mailbox owned by the user name, or it is sent
+       back as undeliverable.
+
+       The system administrator can specify a comma/space  separated  list  of
+       ~/.forward like files through the forward_path configuration parameter.
+       Upon delivery, the local delivery agent tries each pathname in the list
+       until a file is found.
+
+       Delivery via ~/.forward files is done with the privileges of the recip-
+       ient.  Thus, ~/.forward like files must be readable by  the  recipient,
+       and  their  parent directory needs to have "execute" permission for the
+       recipient.
+
+       The forward_path parameter is subject to interpolation of $user (recip-
+       ient  username),  $home  (recipient  home directory), $shell (recipient
+       shell), $recipient (complete recipient address), $extension  (recipient
+       address  extension), $domain (recipient domain), $local (entire recipi-
+       ent   address   localpart)   and   $recipient_delimiter.   The    forms
+       ${name?value} and ${name?{value}} (Postfix 3.0 and later) expand condi-
+       tionally to value when $name is defined, and  the  forms  ${name:value}
+       ${name:{value}}  (Postfix  3.0 and later) expand conditionally to value
+       when $name is not defined.  The form ${name?{value1}:{value2}} (Postfix
+       3.0  and  later) expands conditionally to value1 when $name is defined,
+       or value2 otherwise. Characters that may have special  meaning  to  the
+       shell or file system are replaced with underscores. The list of accept-
+       able characters is specified with the forward_expansion_filter configu-
+       ration parameter.
+
+       An  alias  or ~/.forward file may list any combination of external com-
+       mands, destination file names, :include: directives, or mail addresses.
+       See  aliases(5)  for a precise description. Each line in a user's .for-
+       ward 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 ~/.forward
+       file, delivery is made to the user's mailbox instead.  An empty ~/.for-
+       ward file means do not forward mail.
+
+       In  order to prevent the mail system from using up unreasonable amounts
+       of memory, input records read from :include: or from  ~/.forward  files
+       are broken up into chunks of length line_length_limit.
+
+       While  expanding  aliases,  ~/.forward  files,  and  so on, the program
+       attempts to avoid duplicate deliveries. The duplicate_filter_limit con-
+       figuration parameter limits the number of remembered recipients.
+
+MAIL FORWARDING
+       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  Delivered-To:  header  with  the  final  envelope   recipient
+       address.  If  mail  arrives for a recipient that is already listed in a
+       Delivered-To: header, the message is bounced.
+
+MAILBOX DELIVERY
+       The default per-user mailbox is a file in the UNIX mail spool directory
+       (/var/mail/user or /var/spool/mail/user); the location can be specified
+       with the mail_spool_directory configuration parameter. Specify  a  name
+       ending in / for qmail-compatible maildir delivery.
+
+       Alternatively,  the  per-user  mailbox can be a file in the user's home
+       directory with a name  specified  via  the  home_mailbox  configuration
+       parameter. Specify a relative path name. Specify a name ending in / for
+       qmail-compatible maildir delivery.
+
+       Mailbox delivery can be delegated to an external command specified with
+       the  mailbox_command_maps and mailbox_command 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 default_privs).
+
+       Mailbox delivery can be delegated  to  alternative  message  transports
+       specified  in the master.cf file.  The mailbox_transport_maps and mail-
+       box_transport 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  fall-
+       back_transport_maps   and   fallback_transport  parameters  specify  an
+       optional message transport for recipients that are  not  found  in  the
+       aliases(5) or UNIX passwd database.
+
+       In  the  case  of  UNIX-style  mailbox  delivery,  the  local(8) daemon
+       prepends a "From sender time_stamp" envelope header  to  each  message,
+       prepends  an  X-Original-To: header with the recipient address as given
+       to Postfix, prepends an optional Delivered-To: header  with  the  final
+       envelope  recipient  address,  prepends  a Return-Path: header with the
+       envelope sender address, prepends a > character to lines beginning with
+       "From  ",  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 maildir delivery, the local daemon prepends an optional
+       Delivered-To:  header  with  the  final  envelope  recipient   address,
+       prepends  an  X-Original-To: header with the recipient address as given
+       to Postfix, and prepends a Return-Path: header with the envelope sender
+       address.
+
+EXTERNAL COMMAND DELIVERY
+       The  allow_mail_to_commands  configuration parameter restricts delivery
+       to external commands. The default setting (alias, forward) forbids com-
+       mand destinations in :include: files.
+
+       Optionally, the process working directory is changed to the path speci-
+       fied with command_execution_directory (Postfix 2.2 and later).  Failure
+       to change directory causes mail to be deferred.
+
+       The  command_execution_directory parameter value is subject to interpo-
+       lation of $user (recipient username), $home (recipient home directory),
+       $shell  (recipient  shell),  $recipient  (complete  recipient address),
+       $extension (recipient address extension), $domain  (recipient  domain),
+       $local  (entire  recipient address localpart) and $recipient_delimiter.
+       The forms ${name?value} and ${name?{value}}  (Postfix  3.0  and  later)
+       expand  conditionally  to  value  when  $name is defined, and the forms
+       ${name:value} and ${name:{value}} (Postfix 3.0 and later) expand condi-
+       tionally   to   value   when   $name   is   not   defined.    The  form
+       ${name?{value1}:{value2}} (Postfix 3.0 and later) expands conditionally
+       to  value1  when $name is defined, or value2 otherwise. Characters that
+       may have special meaning to the shell or file system are replaced  with
+       underscores.  The  list  of acceptable characters is specified with the
+       execution_directory_expansion_filter configuration parameter.
+
+       The command is executed directly  where  possible.  Assistance  by  the
+       shell  (/bin/sh 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  com-
+       mand_time_limit seconds.  Command exit status  codes  are  expected  to
+       follow  the  conventions  defined in <sysexits.h>.  Exit status 0 means
+       normal successful completion.
+
+       Postfix version 2.3 and later support RFC  3463-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 with underscores.  The list of acceptable characters is speci-
+       fied with the command_expansion_filter configuration parameter.
+
+       SHELL  The recipient user's login shell.
+
+       HOME   The recipient user's home directory.
+
+       USER   The bare recipient name.
+
+       EXTENSION
+              The optional recipient address extension.
+
+       DOMAIN The recipient address domain part.
+
+       LOGNAME
+              The bare recipient name.
+
+       LOCAL  The entire recipient address localpart (text to the left of  the
+              rightmost @ character).
+
+       ORIGINAL_RECIPIENT
+              The  entire  recipient  address, before any address rewriting or
+              aliasing (Postfix 2.5 and later).
+
+       RECIPIENT
+              The entire recipient address.
+
+       SENDER The entire sender address.
+
+       Additional remote client information is made available via the  follow-
+       ing environment variables:
+
+       CLIENT_ADDRESS
+              Remote client network address. Available as of Postfix 2.2.
+
+       CLIENT_HELO
+              Remote  client  EHLO  command parameter. Available as of Postfix
+              2.2.
+
+       CLIENT_HOSTNAME
+              Remote client hostname. Available as of Postfix 2.2.
+
+       CLIENT_PROTOCOL
+              Remote client protocol. Available as of Postfix 2.2.
+
+       SASL_METHOD
+              SASL authentication method specified in the remote  client  AUTH
+              command. Available as of Postfix 2.2.
+
+       SASL_SENDER
+              SASL  sender  address  specified  in the remote client MAIL FROM
+              command. Available as of Postfix 2.2.
+
+       SASL_USERNAME
+              SASL username specified  in  the  remote  client  AUTH  command.
+              Available as of Postfix 2.2.
+
+       The  PATH  environment  variable  is always reset to a system-dependent
+       default path, and environment variables whose names are blessed by  the
+       export_environment configuration parameter are exported unchanged.
+
+       The current working directory is the mail queue directory.
+
+       The local(8) daemon prepends a "From sender time_stamp" envelope header
+       to each message, prepends an X-Original-To: header with  the  recipient
+       address  as given to Postfix, prepends an optional Delivered-To: header
+       with the final recipient  envelope  address,  prepends  a  Return-Path:
+       header with the sender envelope address, and appends no empty line.
+
+EXTERNAL FILE DELIVERY
+       The  delivery  format  depends on the destination filename syntax.  The
+       default is to use UNIX-style mailbox format.  Specify a name ending  in
+       / for qmail-compatible maildir delivery.
+
+       The  allow_mail_to_files  configuration parameter restricts delivery to
+       external files. The default setting (alias, forward) forbids file  des-
+       tinations in :include: files.
+
+       In  the  case  of  UNIX-style  mailbox  delivery,  the  local(8) daemon
+       prepends a "From sender time_stamp" envelope header  to  each  message,
+       prepends  an  X-Original-To: header with the recipient address as given
+       to Postfix, prepends an optional Delivered-To: header  with  the  final
+       recipient  envelope  address, prepends a > character to lines beginning
+       with "From ", and appends an empty line.  The envelope  sender  address
+       is  available  in  the  Return-Path: 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 maildir delivery, the local daemon prepends an  optional
+       Delivered-To:  header  with  the  final envelope recipient address, and
+       prepends an X-Original-To: header with the recipient address  as  given
+       to   Postfix.    The  envelope  sender  address  is  available  in  the
+       Return-Path: header.
+
+ADDRESS EXTENSION
+       The optional recipient_delimiter configuration parameter specifies  how
+       to separate address extensions from local recipient names.
+
+       For  example,  with  "recipient_delimiter  =  +",  mail for name+foo is
+       delivered to the alias name+foo or to the alias name, to  the  destina-
+       tions listed in ~name/.forward+foo or in ~name/.forward, to the mailbox
+       owned by the user name, or it is sent back as undeliverable.
+
+DELIVERY RIGHTS
+       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  local(8)  daemon  uses  the  owner
+       rights  of  the :include: file or alias database.  When those files are
+       owned by the superuser, delivery is made with the rights specified with
+       the default_privs configuration parameter.
+
+STANDARDS
+       RFC 822 (ARPA Internet Text Messages)
+       RFC 3463 (Enhanced status codes)
+
+DIAGNOSTICS
+       Problems  and  transactions  are  logged  to syslogd(8) or postlogd(8).
+       Corrupted message files are marked so that the queue manager  can  move
+       them to the corrupt queue afterwards.
+
+       Depending  on the setting of the notify_classes parameter, the postmas-
+       ter is notified of bounces and of other trouble.
+
+SECURITY
+       The local(8) 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  local(8)  delivery agent disallows regular expression substitution
+       of $1 etc. in alias_maps, because that would open a security hole.
+
+       The local(8) delivery agent will silently ignore requests  to  use  the
+       proxymap(8)  server  within  alias_maps. Instead it will open the table
+       directly.  Before Postfix version 2.2, the local(8) delivery agent will
+       terminate with a fatal error.
+
+BUGS
+       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 ~/.forward files are not detected  early.
+       The  resulting  mail forwarding loop is broken by the use of the Deliv-
+       ered-To: message header.
+
+CONFIGURATION PARAMETERS
+       Changes to main.cf are picked up automatically, as  local(8)  processes
+       run for only a limited amount of time. Use the command "postfix reload"
+       to speed up a change.
+
+       The text below provides only a parameter summary. See  postconf(5)  for
+       more details including examples.
+
+COMPATIBILITY CONTROLS
+       biff (yes)
+              Whether or not to use the local biff service.
+
+       expand_owner_alias (no)
+              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.
+
+       owner_request_special (yes)
+              Enable  special  treatment  for  owner-listname  entries  in the
+              aliases(5)  file,  and  don't  split  owner-listname  and  list-
+              name-request  address localparts when the recipient_delimiter is
+              set to "-".
+
+       sun_mailtool_compatibility (no)
+              Obsolete SUN mailtool compatibility feature.
+
+       Available in Postfix version 2.3 and later:
+
+       frozen_delivered_to (yes)
+              Update the local(8) delivery agent's idea of  the  Delivered-To:
+              address  (see  prepend_delivered_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:
+
+       strict_mailbox_ownership (yes)
+              Defer  delivery  when a mailbox file is not owned by its recipi-
+              ent.
+
+       reset_owner_alias (no)
+              Reset the local(8) delivery  agent's  idea  of  the  owner-alias
+              attribute,  when  delivering mail to a child alias that does not
+              have its own owner alias.
+
+       Available in Postfix version 3.0 and later:
+
+       local_delivery_status_filter ($default_delivery_status_filter)
+              Optional filter for the local(8) delivery agent  to  change  the
+              status  code  or  explanatory text of successful or unsuccessful
+              deliveries.
+
+DELIVERY METHOD CONTROLS
+       The precedence of local(8)  delivery  methods  from  high  to  low  is:
+       aliases,  .forward  files,  mailbox_transport_maps,  mailbox_transport,
+       mailbox_command_maps, mailbox_command, home_mailbox,  mail_spool_direc-
+       tory, fallback_transport_maps, fallback_transport, and luser_relay.
+
+       alias_maps (see 'postconf -d' output)
+              The alias databases that are used for local(8) delivery.
+
+       forward_path (see 'postconf -d' output)
+              The  local(8)  delivery agent search list for finding a .forward
+              file with user-specified delivery methods.
+
+       mailbox_transport_maps (empty)
+              Optional  lookup  tables  with  per-recipient  message  delivery
+              transports  to use for local(8) mailbox delivery, whether or not
+              the recipients are found in the UNIX passwd database.
+
+       mailbox_transport (empty)
+              Optional message delivery transport that the  local(8)  delivery
+              agent  should  use for mailbox delivery to all local recipients,
+              whether or not they are found in the UNIX passwd database.
+
+       mailbox_command_maps (empty)
+              Optional lookup tables with per-recipient external  commands  to
+              use for local(8) mailbox delivery.
+
+       mailbox_command (empty)
+              Optional  external  command  that  the  local(8)  delivery agent
+              should use for mailbox delivery.
+
+       home_mailbox (empty)
+              Optional pathname of a  mailbox  file  relative  to  a  local(8)
+              user's home directory.
+
+       mail_spool_directory (see 'postconf -d' output)
+              The directory where local(8) UNIX-style mailboxes are kept.
+
+       fallback_transport_maps (empty)
+              Optional  lookup  tables  with  per-recipient  message  delivery
+              transports for recipients that the local(8) delivery agent could
+              not find in the aliases(5) or UNIX password database.
+
+       fallback_transport (empty)
+              Optional  message  delivery transport that the local(8) delivery
+              agent should use for names that are not found in the  aliases(5)
+              or UNIX password database.
+
+       luser_relay (empty)
+              Optional  catch-all destination for unknown local(8) recipients.
+
+       Available in Postfix version 2.2 and later:
+
+       command_execution_directory (empty)
+              The local(8) delivery agent working directory  for  delivery  to
+              external commands.
+
+MAILBOX LOCKING CONTROLS
+       deliver_lock_attempts (20)
+              The maximal number of attempts to acquire an exclusive lock on a
+              mailbox file or bounce(8) logfile.
+
+       deliver_lock_delay (1s)
+              The time between attempts to acquire  an  exclusive  lock  on  a
+              mailbox file or bounce(8) logfile.
+
+       stale_lock_time (500s)
+              The  time  after  which  a  stale  exclusive mailbox lockfile is
+              removed.
+
+       mailbox_delivery_lock (see 'postconf -d' output)
+              How to lock a  UNIX-style  local(8)  mailbox  before  attempting
+              delivery.
+
+RESOURCE AND RATE CONTROLS
+       command_time_limit (1000s)
+              Time limit for delivery to external commands.
+
+       duplicate_filter_limit (1000)
+              The maximal number of addresses remembered by the address dupli-
+              cate filter for aliases(5) or virtual(5) alias expansion, or for
+              showq(8) queue displays.
+
+       mailbox_size_limit (51200000)
+              The  maximal  size of any local(8) individual mailbox or maildir
+              file, or zero (no limit).
+
+       Implemented in the qmgr(8) daemon:
+
+       local_destination_concurrency_limit (2)
+              The maximal number of parallel deliveries  via  the  local  mail
+              delivery  transport  to the same recipient (when "local_destina-
+              tion_recipient_limit = 1") or the  maximal  number  of  parallel
+              deliveries  to  the  same  local  domain  (when  "local_destina-
+              tion_recipient_limit > 1").
+
+       local_destination_recipient_limit (1)
+              The maximal number of recipients per message  delivery  via  the
+              local mail delivery transport.
+
+SECURITY CONTROLS
+       allow_mail_to_commands (alias, forward)
+              Restrict local(8) mail delivery to external commands.
+
+       allow_mail_to_files (alias, forward)
+              Restrict local(8) mail delivery to external files.
+
+       command_expansion_filter (see 'postconf -d' output)
+              Restrict  the characters that the local(8) delivery agent allows
+              in $name  expansions  of  $mailbox_command  and  $command_execu-
+              tion_directory.
+
+       default_privs (nobody)
+              The  default  rights  used  by  the  local(8) delivery agent for
+              delivery to an external file or command.
+
+       forward_expansion_filter (see 'postconf -d' output)
+              Restrict the characters that the local(8) delivery agent  allows
+              in $name expansions of $forward_path.
+
+       Available in Postfix version 2.2 and later:
+
+       execution_directory_expansion_filter (see 'postconf -d' output)
+              Restrict  the characters that the local(8) delivery agent allows
+              in $name expansions of $command_execution_directory.
+
+       Available in Postfix version 2.5.3 and later:
+
+       strict_mailbox_ownership (yes)
+              Defer delivery when a mailbox file is not owned by  its  recipi-
+              ent.
+
+MISCELLANEOUS CONTROLS
+       config_directory (see 'postconf -d' output)
+              The  default  location of the Postfix main.cf and master.cf con-
+              figuration files.
+
+       daemon_timeout (18000s)
+              How much time a Postfix daemon process  may  take  to  handle  a
+              request before it is terminated by a built-in watchdog timer.
+
+       delay_logging_resolution_limit (2)
+              The  maximal  number of digits after the decimal point when log-
+              ging sub-second delay values.
+
+       export_environment (see 'postconf -d' output)
+              The list of environment variables that a  Postfix  process  will
+              export to non-Postfix processes.
+
+       ipc_timeout (3600s)
+              The  time  limit  for  sending  or receiving information over an
+              internal communication channel.
+
+       local_command_shell (empty)
+              Optional shell program for local(8) delivery to non-Postfix com-
+              mands.
+
+       max_idle (100s)
+              The  maximum  amount of time that an idle Postfix daemon process
+              waits for an incoming connection before terminating voluntarily.
+
+       max_use (100)
+              The maximal number of incoming connections that a Postfix daemon
+              process will service before terminating voluntarily.
+
+       prepend_delivered_header (command, file, forward)
+              The message delivery contexts where the Postfix local(8)  deliv-
+              ery  agent  prepends  a  Delivered-To:   message header with the
+              address that the mail was delivered to.
+
+       process_id (read-only)
+              The process ID of a Postfix command or daemon process.
+
+       process_name (read-only)
+              The process name of a Postfix command or daemon process.
+
+       propagate_unmatched_extensions (canonical, virtual)
+              What address lookup tables copy an address  extension  from  the
+              lookup key to the lookup result.
+
+       queue_directory (see 'postconf -d' output)
+              The location of the Postfix top-level queue directory.
+
+       recipient_delimiter (empty)
+              The  set of characters that can separate an email address local-
+              part, user name, or a .forward file name from its extension.
+
+       require_home_directory (no)
+              Require that a local(8) recipient's home directory exists before
+              mail delivery is attempted.
+
+       syslog_facility (mail)
+              The syslog facility of Postfix logging.
+
+       syslog_name (see 'postconf -d' output)
+              A  prefix  that  is  prepended  to  the  process  name in syslog
+              records, so that, for example, "smtpd" becomes "prefix/smtpd".
+
+       Available in Postfix version 3.3 and later:
+
+       enable_original_recipient (yes)
+              Enable support for  the  original  recipient  address  after  an
+              address  is  rewritten  to a different address (for example with
+              aliasing or with canonical mapping).
+
+       service_name (read-only)
+              The master.cf service name of a Postfix daemon process.
+
+       Available in Postfix 3.5 and later:
+
+       info_log_address_format (external)
+              The email address form that will be used  in  non-debug  logging
+              (info, warning, etc.).
+
+FILES
+       The following are examples; details differ between systems.
+       $HOME/.forward, per-user aliasing
+       /etc/aliases, system-wide alias database
+       /var/spool/mail, system mailboxes
+
+SEE ALSO
+       qmgr(8), queue manager
+       bounce(8), delivery status reports
+       newaliases(1), create/update alias database
+       postalias(1), create/update alias database
+       aliases(5), format of alias database
+       postconf(5), configuration parameters
+       master(5), generic daemon options
+       postlogd(8), Postfix logging
+       syslogd(8), system logging
+
+LICENSE
+       The Secure Mailer license must be distributed with this software.
+
+HISTORY
+       The  Delivered-To: message header appears in the qmail system by Daniel
+       Bernstein.
+
+       The maildir structure appears in the qmail system by Daniel  Bernstein.
+
+AUTHOR(S)
+       Wietse Venema
+       IBM T.J. Watson Research
+       P.O. Box 704
+       Yorktown Heights, NY 10598, USA
+
+       Wietse Venema
+       Google, Inc.
+       111 8th Avenue
+       New York, NY 10011, USA
+
+                                                                      LOCAL(8)
+
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