summaryrefslogtreecommitdiffstats
path: root/html/local.8.html
blob: 0a2bc44eb765b128e686e7c32a6add2502eb75e4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
<!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>send-</b>
       <b>mail</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 &gt; 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 &lt;<b>sysexits.h</b>&gt;.  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 &gt; 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-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) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>.
       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   "<i>aliasname</i>"  that  has  an
              "owner-<i>aliasname</i>"  companion  alias,  set  the  envelope  sender
              address to the expansion of the "owner-<i>aliasname</i>" alias.

       <b><a href="postconf.5.html#owner_request_special">owner_request_special</a> (yes)</b>
              Enable  special  treatment  for  owner-<i>listname</i>  entries  in the
              <a href="aliases.5.html"><b>aliases</b>(5)</a>  file,  and  don't  split  owner-<i>listname</i>  and  <i>list-</i>
              <i>name</i>-request  address localparts 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  <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.

       Available in Postfix version 3.0 and later:

       <b><a href="postconf.5.html#local_delivery_status_filter">local_delivery_status_filter</a> ($<a href="postconf.5.html#default_delivery_status_filter">default_delivery_status_filter</a>)</b>
              Optional filter for the <a href="local.8.html"><b>local</b>(8)</a> delivery agent  to  change  the
              status  code  or  explanatory text of successful or unsuccessful
              deliveries.

<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#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).

       Implemented in the <a href="qmgr.8.html">qmgr(8)</a> daemon:

       <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> &gt; 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>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>
              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:

       <b><a href="postconf.5.html#enable_original_recipient">enable_original_recipient</a> (yes)</b>
              Enable  support  for  the  original  recipient  address after an
              address is rewritten to a different address  (for  example  with
              aliasing or with canonical mapping).

       <b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b>
              The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process.

<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
       <a href="postlogd.8.html">postlogd(8)</a>, Postfix logging
       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

       Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA

                                                                      LOCAL(8)
</pre> </body> </html>