source: server/mail/postfix.xml@ 2686d16

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Last change on this file since 2686d16 was 2686d16, checked in by Archaic <archaic@…>, 18 years ago

Updated to postfix-2.2.8.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@5675 af4574ff-66df-0310-9fd7-8a98e5e911e0
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY postfix-download-http "http://www.mirrorspace.org/postfix/official/postfix-&postfix-version;.tar.gz">
8 <!ENTITY postfix-download-ftp "ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-&postfix-version;.tar.gz">
9 <!ENTITY postfix-md5sum "971bf94de3e8433c8965c27b42d56b9a">
10 <!ENTITY postfix-size "2.4 MB">
11 <!ENTITY postfix-buildsize "73 MB">
12 <!ENTITY postfix-time "0.3 SBU">
13]>
14
15<sect1 id="postfix" xreflabel="Postfix-&postfix-version;">
16 <?dbhtml filename="postfix.html"?>
17
18 <sect1info>
19 <othername>$LastChangedBy$</othername>
20 <date>$Date$</date>
21 <keywordset>
22 <keyword role="package">postfix-&postfix-version;.tar</keyword>
23 <keyword role="ftpdir">postfix</keyword>
24 </keywordset>
25 </sect1info>
26
27 <title>Postfix-&postfix-version;</title>
28
29 <indexterm zone="postfix">
30 <primary sortas="a-Postfix">Postfix</primary>
31 </indexterm>
32
33 <sect2 role="package">
34 <title>Introduction to Postfix</title>
35
36 <para>The <application>Postfix</application> package contains a Mail
37 Transport Agent (MTA). This is useful for sending email to other users
38 of your host machine. It can also be configured to be a central mail
39 server for your domain, a mail relay agent or simply a mail delivery
40 agent to your local Internet Service Provider (ISP).</para>
41
42 <bridgehead renderas="sect3">Package Information</bridgehead>
43 <itemizedlist spacing="compact">
44 <listitem>
45 <para>Download (HTTP): <ulink url="&postfix-download-http;"/></para>
46 </listitem>
47 <listitem>
48 <para>Download (FTP): <ulink url="&postfix-download-ftp;"/></para>
49 </listitem>
50 <listitem>
51 <para>Download MD5 sum: &postfix-md5sum;</para>
52 </listitem>
53 <listitem>
54 <para>Download size: &postfix-size;</para>
55 </listitem>
56 <listitem>
57 <para>Estimated disk space required: &postfix-buildsize;</para>
58 </listitem>
59 <listitem>
60 <para>Estimated build time: &postfix-time;</para>
61 </listitem>
62 </itemizedlist>
63
64 <bridgehead renderas="sect3">Postfix Dependencies</bridgehead>
65
66 <!-- commenting this out as BDB is now built in LFS
67
68 <bridgehead renderas="sect4">Required</bridgehead>
69 <para role="required"><xref linkend="db"/></para>
70
71 -->
72
73 <bridgehead renderas="sect4">Optional</bridgehead>
74 <para role="optional"><xref linkend="pcre"/>,
75 <xref linkend="mysql"/>,
76 <xref linkend="postgresql"/>,
77 <xref linkend="openldap"/>,
78 <xref linkend="openssl"/>,
79 <xref linkend="cyrus-sasl"/>, and
80 <ulink url="http://cr.yp.to/cdb.html">cdb</ulink> or
81 <ulink url="http://www.corpit.ru/mjt/tinycdb.html">TinyCDB</ulink></para>
82
83 </sect2>
84
85 <sect2 role="installation">
86 <title>Installation of Postfix</title>
87
88 <sect3>
89 <title>Configuring the Build</title>
90
91 <para>The <application>Postfix</application> source tree does not contain
92 a <filename>configure</filename> script, rather the makefile in the
93 top-level directory contains a <option>makefiles</option> target that
94 regenerates all the other makefiles in the build tree. If you wish to
95 use additional software such as a database back-end for virtual users, or
96 TLS/SSL authentication, you will need to regenerate the makefiles using
97 one or more of the appropriate <envar>CCARGS</envar> and
98 <envar>AUXLIBS</envar> settings listed below.</para>
99
100 <para>Here is an example that combines the TLS and
101 <application>Cyrus-SASL</application> arguments:</para>
102
103<screen><userinput>make makefiles \
104CCARGS='-DUSE_TLS -DUSE_SASL_AUTH -DDEF_DAEMON_DIR=\"/usr/lib/postfix\" \
105 -DDEF_MANPAGE_DIR=\"/usr/share/man\" -I/usr/include/openssl \
106 -I/usr/include/sasl' \
107 AUXLIBS='-L/usr/lib -lssl -lcrypto -lsasl2'</userinput></screen>
108
109 <sect4>
110 <title>TLS Authentication</title>
111
112 <para>To use TLS authentication with postfix
113 you will need to pass the following values to the
114 <command>make makefiles</command> command:</para>
115
116<screen><literal>CCARGS='-DUSE_TLS -I/usr/include/openssl'
117AUXLIBS='-L/usr/lib -lssl -lcrypto'</literal></screen>
118
119 <para>To use TLS you will also need
120 <xref linkend="cyrus-sasl"/>.</para>
121
122 </sect4>
123
124 <sect4>
125 <title>Cyrus-SASL</title>
126
127 <para>To use <application>Cyrus-SASL</application> with
128 <application>Postfix</application>, use the following arguments:</para>
129
130<screen><literal>CCARGS='-DUSE_SASL_AUTH -I/usr/include/sasl'
131AUXLIBS='-L/usr/lib -lsasl2'</literal></screen>
132
133 </sect4>
134
135 <sect4>
136 <title>OpenLDAP</title>
137
138 <para>To use <application>OpenLDAP</application> with
139 <application>Postfix</application>, use the following
140 arguments:</para>
141
142<screen><literal>CCARGS='-I/usr/include -DHAS_LDAP'
143AUXLIBS='-L/usr/lib -lldap -llber'</literal></screen>
144
145 </sect4>
146
147 <sect4>
148 <title>MySQL</title>
149
150 <para>To use <application>MySQL</application> with
151 <application>Postfix</application>, use the following
152 arguments:</para>
153
154<screen><literal>CCARGS='-DHAS_MYSQL -I/usr/include/mysql'
155AUXLIBS='-L/usr/lib -lmysqlclient -lz -lm'</literal></screen>
156
157 </sect4>
158
159 <sect4>
160 <title>PostgreSQL</title>
161
162 <para>To use <application>PostgreSQL</application> with
163 <application>Postfix</application>, use the following
164 arguments:</para>
165
166<screen><literal>CCARGS='-DHAS_PGSQL -I/usr/include/postgresql'
167AUXLIBS='-L/usr/lib -lpq -lz -lm'</literal></screen>
168
169 </sect4>
170
171 <sect4>
172 <title>TinyCDB</title>
173
174 <para>To use <application>TinyCDB</application> with
175 <application>Postfix</application>, use the following
176 arguments:</para>
177
178<screen><literal>CCARGS='-DHAS_CDB'
179AUXLIBS='<replaceable>[/path/to/CDB]/</replaceable>libcdb.a'</literal></screen>
180
181 </sect4>
182
183 </sect3>
184
185 <sect3>
186 <title>Installing Postfix</title>
187
188 <para>Before you compile the program, you need to create users and groups
189 that will be expected to be in place during the installation.
190 Add the users and groups with the following commands issued by the
191 <systemitem class='username'>root</systemitem> user:</para>
192
193<screen role="root"><userinput>groupadd -g 32 postfix &amp;&amp;
194groupadd -g 33 postdrop &amp;&amp;
195useradd -c "Postfix Daemon User" -d /dev/null -g postfix \
196 -s /bin/false -u 32 postfix &amp;&amp;
197chown -v postfix:postfix /var/mail</userinput></screen>
198
199 <para>Install <application>Postfix</application> by running the
200 following commands:</para>
201
202<screen><userinput>make makefiles CCARGS='-DDEF_DAEMON_DIR=\"/usr/lib/postfix\" \
203 -DDEF_MANPAGE_DIR=\"/usr/share/man\" <replaceable>[additional args]</replaceable>' \
204 <replaceable>[AUXLIBS='additonal args']</replaceable> &amp;&amp;
205make</userinput></screen>
206
207 <para>This package does not come with a test suite.</para>
208
209 <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
210
211<screen role='root'><userinput>sh postfix-install -non-interactive</userinput></screen>
212
213 <para>The final installation step is to install the program's documentation
214 with the following commands (again, as the
215 <systemitem class="username">root</systemitem> user):</para>
216
217<screen role="root"><userinput>install -v -d /usr/share/doc/postfix &amp;&amp;
218cp -v -rf html/* /usr/share/doc/postfix</userinput></screen>
219
220 </sect3>
221
222 </sect2>
223
224 <sect2 role="commands">
225 <title>Command Explanations</title>
226
227 <para><command>make makefiles</command>: This command rebuilds the
228 makefiles throughout the source tree to use the options contained in the
229 <envar>CCARGS</envar> and <envar>AUXLIBS</envar> variables.</para>
230
231 <para><command>sh postfix-install -non-interactive</command> : This
232 keeps the install script from asking any questions, thereby accepting
233 default destination directories in all but the two cases mentioned in
234 the 'make makefiles' command.</para>
235
236 </sect2>
237
238 <sect2 role="configuration">
239 <title>Configuring Postfix</title>
240
241 <sect3 id="postfix-config">
242 <title>Config Files</title>
243
244 <para><filename>/etc/aliases</filename>,
245 <filename>/etc/postfix/main.cf</filename>, and
246 <filename>/etc/postfix/master.cf</filename></para>
247
248 <indexterm zone="postfix postfix-config">
249 <primary sortas="e-etc-aliases">/etc/aliases</primary>
250 </indexterm>
251
252 <indexterm zone="postfix postfix-config">
253 <primary sortas="e-etc-postfix-star">/etc/postfix/*</primary>
254 </indexterm>
255
256 </sect3>
257
258 <sect3>
259 <title>Configuration Information</title>
260
261<screen role="root"><userinput>cat &gt;&gt; /etc/aliases &lt;&lt; "EOF"
262<literal># Begin /etc/aliases
263
264MAILER-DAEMON: postmaster
265postmaster: root
266
267root: LOGIN
268# End /etc/aliases</literal>
269EOF</userinput></screen>
270
271 <note>
272 <para>To protect an existing <filename>/etc/aliases</filename> file,
273 the above command appends these aliases to it if it exists. This file
274 should be checked and duplicate aliases removed, if present.</para>
275 </note>
276
277 <para>The <filename>/etc/aliases</filename> file that was just created
278 or appended, the <filename>main.cf</filename> and the
279 <filename>master.cf</filename> must be personalized for your system.
280 The <filename>aliases</filename> file needs your non-root login identity
281 so mail addressed to <systemitem class="username">root</systemitem> can
282 be forwarded to you at the user level. The <filename>main.cf</filename>
283 file needs your fully qualified hostname. All of these edits can be done
284 with <command>sed</command> commands entered into the console with
285 appropriate substitutions of your non-root login name for
286 <replaceable>[user]</replaceable> and your fully qualified hostname for
287 <replaceable>[localhost.localdomain]</replaceable>. You will find the
288 <filename>main.cf</filename> file is self documenting, so load it into
289 your editor to make the changes you need for your situation.</para>
290
291<screen role="root"><userinput>sed -i "s/LOGIN/<replaceable>[user]</replaceable>/" /etc/aliases &amp;&amp;
292sed -i "s/#myhostname = host.domain.tld/myhostname = \
293 <replaceable>[localhost.localdomain]</replaceable>/" /etc/postfix/main.cf &amp;&amp;
294/usr/bin/newaliases &amp;&amp;
295/usr/sbin/postfix start</userinput></screen>
296
297 </sect3>
298
299 <sect3 id="postfix-init">
300 <title>Boot Script</title>
301
302 <para>To automate the running of Postfix at startup, install the
303 <filename>/etc/rc.d/init.d/postfix</filename> init script included
304 in the <xref linkend="bootscripts"/> package.</para>
305
306 <indexterm zone="postfix postfix-init">
307 <primary sortas="f-postfix">postfix</primary>
308 </indexterm>
309
310<screen role="root"><userinput>make install-postfix</userinput></screen>
311
312 </sect3>
313
314 </sect2>
315
316 <sect2 role="content">
317 <title>Contents</title>
318
319 <segmentedlist>
320 <segtitle>Installed Programs</segtitle>
321 <segtitle>Installed Libraries</segtitle>
322 <segtitle>Installed Directories</segtitle>
323
324 <seglistitem>
325 <seg>anvil, bounce, cleanup, discard, error, flush, lmtp, local, mailq,
326 master, newaliases, nqmgr, oqmgr, pickup, pipe, postalias, postcat,
327 postconf, postdrop, postfix, postkick, postlock, postlog, postmap,
328 postqueue, postsuper, proxymap, qmgr, qmqpd, sendmail, showq, smtp,
329 smtpd, spawn, tlsmgr, trivial-rewrite, verify, and virtual</seg>
330 <seg>None</seg>
331 <seg>/etc/postfix, /usr/lib/postfix and /usr/share/doc/postfix</seg>
332 </seglistitem>
333 </segmentedlist>
334
335 <variablelist>
336 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
337 <?dbfo list-presentation="list"?>
338 <?dbhtml list-presentation="table"?>
339
340 <varlistentry id="anvil">
341 <term><command>anvil</command></term>
342 <listitem>
343 <para>Provides connection and rate request limiting.</para>
344 <indexterm zone="postfix anvil">
345 <primary sortas="b-anvil">anvil</primary>
346 </indexterm>
347 </listitem>
348 </varlistentry>
349
350 <varlistentry id="bounce">
351 <term><command>bounce</command></term>
352 <listitem>
353 <para>A daemon that maintains per-message log files with
354 non-delivery status information.</para>
355 <indexterm zone="postfix bounce">
356 <primary sortas="b-bounce">bounce</primary>
357 </indexterm>
358 </listitem>
359 </varlistentry>
360
361 <varlistentry id="cleanup">
362 <term><command>cleanup</command></term>
363 <listitem>
364 <para>A daemon that processes inbound mail, inserts it into the
365 incoming mail queue, and informs the queue manager of its
366 arrival.</para>
367 <indexterm zone="postfix cleanup">
368 <primary sortas="b-cleanup">cleanup</primary>
369 </indexterm>
370 </listitem>
371 </varlistentry>
372
373 <varlistentry id="discard">
374 <term><command>discard</command></term>
375 <listitem>
376 <para>Processes delivery requests from the queue manager that cannot
377 be delivered to the recipient.</para>
378 <indexterm zone="postfix discard">
379 <primary sortas="b-discard">discard</primary>
380 </indexterm>
381 </listitem>
382 </varlistentry>
383
384 <varlistentry id="error">
385 <term><command>error</command></term>
386 <listitem>
387 <para>A deamon that processes non-delivery requests from the
388 queue manager.</para>
389 <indexterm zone="postfix error">
390 <primary sortas="b-error">error</primary>
391 </indexterm>
392 </listitem>
393 </varlistentry>
394
395 <varlistentry id="flush">
396 <term><command>flush</command></term>
397 <listitem>
398 <para>A daemon that maintains a record of deferred mail by
399 destination.</para>
400 <indexterm zone="postfix flush">
401 <primary sortas="b-flush">flush</primary>
402 </indexterm>
403 </listitem>
404 </varlistentry>
405
406 <varlistentry id="lmtp">
407 <term><command>lmtp</command></term>
408 <listitem>
409 <para>A daemon that processes message delivery requests from the
410 queue manager.</para>
411 <indexterm zone="postfix lmtp">
412 <primary sortas="b-lmtp">lmtp</primary>
413 </indexterm>
414 </listitem>
415 </varlistentry>
416
417 <varlistentry id="local">
418 <term><command>local</command></term>
419 <listitem>
420 <para>A daemon that processes delivery requests from the queue
421 manager to deliver mail to local recipients.</para>
422 <indexterm zone="postfix local">
423 <primary sortas="b-local">local</primary>
424 </indexterm>
425 </listitem>
426 </varlistentry>
427
428 <varlistentry id="mailq">
429 <term><command>mailq</command></term>
430 <listitem>
431 <para>A symlink to <filename>sendmail</filename>.</para>
432 <indexterm zone="postfix mailq">
433 <primary sortas="b-mailq">mailq</primary>
434 </indexterm>
435 </listitem>
436 </varlistentry>
437
438 <varlistentry id="master">
439 <term><command>master</command></term>
440 <listitem>
441 <para>The resident process that runs
442 <application>Postfix</application> daemons on demand.</para>
443 <indexterm zone="postfix master">
444 <primary sortas="b-master">master</primary>
445 </indexterm>
446 </listitem>
447 </varlistentry>
448
449 <varlistentry id="newaliases">
450 <term><command>newaliases</command></term>
451 <listitem>
452 <para>A symlink to <filename>sendmail</filename>.</para>
453 <indexterm zone="postfix newaliases">
454 <primary sortas="b-newaliases">newaliases</primary>
455 </indexterm>
456 </listitem>
457 </varlistentry>
458
459 <varlistentry id="nqmgr">
460 <term><command>nqmgr</command></term>
461 <listitem>
462 <para>A daemon that awaits the arrival of incoming mail and
463 arranges for its delivery.</para>
464 <indexterm zone="postfix nqmgr">
465 <primary sortas="b-nqmgr">nqmgr</primary>
466 </indexterm>
467 </listitem>
468 </varlistentry>
469
470 <varlistentry id="oqmgr">
471 <term><command>oqmgr</command></term>
472 <listitem>
473 <para>The old style queue manager. This will be removed soon.</para>
474 <indexterm zone="postfix oqmgr">
475 <primary sortas="b-oqmgr">oqmgr</primary>
476 </indexterm>
477 </listitem>
478 </varlistentry>
479
480 <varlistentry id="pickup">
481 <term><command>pickup</command></term>
482 <listitem>
483 <para>A daemon that waits for hints that new mail has been
484 dropped into the maildrop directory, and feeds it into the
485 <application>cleanup</application> daemon.</para>
486 <indexterm zone="postfix pickup">
487 <primary sortas="b-pickup">pickup</primary>
488 </indexterm>
489 </listitem>
490 </varlistentry>
491
492 <varlistentry id="pipe">
493 <term><command>pipe</command></term>
494 <listitem>
495 <para>A daemon that processes requests from the queue
496 manager to deliver messages to external commands.</para>
497 <indexterm zone="postfix pipe">
498 <primary sortas="b-pipe">pipe</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="postalias">
504 <term><command>postalias</command></term>
505 <listitem>
506 <para>Creates or queries one or more
507 <application>Postfix</application> alias databases, or updates an
508 existing one.</para>
509 <indexterm zone="postfix postalias">
510 <primary sortas="b-postalias">postalias</primary>
511 </indexterm>
512 </listitem>
513 </varlistentry>
514
515 <varlistentry id="postcat">
516 <term><command>postcat</command></term>
517 <listitem>
518 <para>Prints the contents of the
519 <application>named</application> files in human readable format.</para>
520 <indexterm zone="postfix postcat">
521 <primary sortas="b-postcat">postcat</primary>
522 </indexterm>
523 </listitem>
524 </varlistentry>
525
526 <varlistentry id="postconf">
527 <term><command>postconf</command></term>
528 <listitem>
529 <para>Displays or changes the value of
530 <application>Postfix</application> configuration parameters.</para>
531 <indexterm zone="postfix postconf">
532 <primary sortas="b-postconf">postconf</primary>
533 </indexterm>
534 </listitem>
535 </varlistentry>
536
537 <varlistentry id="postdrop">
538 <term><command>postdrop</command></term>
539 <listitem>
540 <para>Creates a file in the maildrop directory and copies
541 it's standard input to the file.</para>
542 <indexterm zone="postfix postdrop">
543 <primary sortas="b-postdrop">postdrop</primary>
544 </indexterm>
545 </listitem>
546 </varlistentry>
547
548 <varlistentry id="postfix-bin">
549 <term><command>postfix</command></term>
550 <listitem>
551 <para>Controls the operation of the
552 <application>Postfix</application> mail system.</para>
553 <indexterm zone="postfix postfix-bin">
554 <primary sortas="b-postfix">postfix</primary>
555 </indexterm>
556 </listitem>
557 </varlistentry>
558
559 <varlistentry id="postkick">
560 <term><command>postkick</command></term>
561 <listitem>
562 <para>Sends requests to the specified service over a
563 local transport channel.</para>
564 <indexterm zone="postfix postkick">
565 <primary sortas="b-postkick">postkick</primary>
566 </indexterm>
567 </listitem>
568 </varlistentry>
569
570 <varlistentry id="postlock">
571 <term><command>postlock</command></term>
572 <listitem>
573 <para>Locks a mail folder for exclusive use, and executes
574 commands passed to it.</para>
575 <indexterm zone="postfix postlock">
576 <primary sortas="b-postlock">postlock</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="postlog">
582 <term><command>postlog</command></term>
583 <listitem>
584 <para>A <application>Postfix</application>-compatible logging
585 interface for use in, for example, shell scripts.</para>
586 <indexterm zone="postfix postlog">
587 <primary sortas="b-postlog">postlog</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591
592 <varlistentry id="postmap">
593 <term><command>postmap</command></term>
594 <listitem>
595 <para>Creates or queries one or more Postfix lookup
596 tables, or updates an existing one.</para>
597 <indexterm zone="postfix postmap">
598 <primary sortas="b-postmap">postmap</primary>
599 </indexterm>
600 </listitem>
601 </varlistentry>
602
603 <varlistentry id="postqueue">
604 <term><command>postqueue</command></term>
605 <listitem>
606 <para>The <application>Postfix</application> user interface for
607 queue management.</para>
608 <indexterm zone="postfix postqueue">
609 <primary sortas="b-postqueue">postqueue</primary>
610 </indexterm>
611 </listitem>
612 </varlistentry>
613
614 <varlistentry id="postsuper">
615 <term><command>postsuper</command></term>
616 <listitem>
617 <para>The <application>Postfix</application> user interface for
618 superuser queue management.</para>
619 <indexterm zone="postfix postsuper">
620 <primary sortas="b-postsuper">postsuper</primary>
621 </indexterm>
622 </listitem>
623 </varlistentry>
624
625 <varlistentry id="proxymap">
626 <term><command>proxymap</command></term>
627 <listitem>
628 <para>Provides read-only table lookup services to other
629 <application>Postfix</application> processes.</para>
630 <indexterm zone="postfix proxymap">
631 <primary sortas="b-proxymap">proxymap</primary>
632 </indexterm>
633 </listitem>
634 </varlistentry>
635
636 <varlistentry id="qmgr">
637 <term><command>qmgr</command></term>
638 <listitem>
639 <para>A daemon that awaits the arrival of incoming mail and
640 arranges for its delivery.</para>
641 <indexterm zone="postfix qmgr">
642 <primary sortas="b-qmgr">qmgr</primary>
643 </indexterm>
644 </listitem>
645 </varlistentry>
646
647 <varlistentry id="qmqpd">
648 <term><command>qmqpd</command></term>
649 <listitem>
650 <para>A daemon that receives one message per connection, and
651 pipes it through the <application>cleanup</application> daemon, and
652 places it into the incoming queue.</para>
653 <indexterm zone="postfix qmqpd">
654 <primary sortas="b-qmqpd">qmqpd</primary>
655 </indexterm>
656 </listitem>
657 </varlistentry>
658
659 <varlistentry id="scache">
660 <term><command>scache</command></term>
661 <listitem>
662 <para>Maintains a connection cache used for sharing a connection
663 multiple times.</para>
664 <indexterm zone="postfix scache">
665 <primary sortas="b-scache">scache</primary>
666 </indexterm>
667 </listitem>
668 </varlistentry>
669
670 <varlistentry id="sendmail-postfix">
671 <term><command>sendmail</command></term>
672 <listitem>
673 <para>The <application>Postfix</application> to
674 <application>Sendmail</application> compatibility interface.</para>
675 <indexterm zone="postfix sendmail-postfix">
676 <primary sortas="b-sendmail">sendmail</primary>
677 </indexterm>
678 </listitem>
679 </varlistentry>
680
681 <varlistentry id="showq">
682 <term><command>showq</command></term>
683 <listitem>
684 <para>A daemon that reports the Postfix mail queue status.</para>
685 <indexterm zone="postfix showq">
686 <primary sortas="b-showq">showq</primary>
687 </indexterm>
688 </listitem>
689 </varlistentry>
690
691 <varlistentry id="smtp">
692 <term><command>smtp</command></term>
693 <listitem>
694 <para>Looks up a list of mail exchanger addresses for the
695 destination host, sorts the list by preference, and connects to
696 each listed address until it finds a server that responds.</para>
697 <indexterm zone="postfix smtp">
698 <primary sortas="b-smtp">smtp</primary>
699 </indexterm>
700 </listitem>
701 </varlistentry>
702
703 <varlistentry id="smtpd">
704 <term><command>smtpd</command></term>
705 <listitem>
706 <para>Accepts network connection requests and performs zero
707 or more SMTP transactions per connection.</para>
708 <indexterm zone="postfix smtpd">
709 <primary sortas="b-smtpd">smtpd</primary>
710 </indexterm>
711 </listitem>
712 </varlistentry>
713
714 <varlistentry id="spawn">
715 <term><command>spawn</command></term>
716 <listitem>
717 <para>Listens on a port as specified in the
718 <application>Postfix</application> <filename>master.cf</filename> file
719 and spawns an external command whenever a connection is
720 established.</para>
721 <indexterm zone="postfix spawn">
722 <primary sortas="b-spawn">spawn</primary>
723 </indexterm>
724 </listitem>
725 </varlistentry>
726
727 <varlistentry id="tlsmgr">
728 <term><command>tlsmgr</command></term>
729 <listitem>
730 <para>Maintains the TLS session cache and acts as the PRNG
731 manager.</para>
732 <indexterm zone="postfix tlsmgr">
733 <primary sortas="b-tlsmgr">tlsmgr</primary>
734 </indexterm>
735 </listitem>
736 </varlistentry>
737
738 <varlistentry id="trivial-rewrite">
739 <term><command>trivial-rewrite</command></term>
740 <listitem>
741 <para>A daemon that rewrites addresses to standard form.</para>
742 <indexterm zone="postfix trivial-rewrite">
743 <primary sortas="b-trivial-rewrite">trivial-rewrite</primary>
744 </indexterm>
745 </listitem>
746 </varlistentry>
747
748 <varlistentry id="verify">
749 <term><command>verify</command></term>
750 <listitem>
751 <para>Maintains a record of what recipient addresses are known
752 to be deliverable or undeliverable.</para>
753 <indexterm zone="postfix verify">
754 <primary sortas="b-verify">verify</primary>
755 </indexterm>
756 </listitem>
757 </varlistentry>
758
759 <varlistentry id="virtual">
760 <term><command>virtual</command></term>
761 <listitem>
762 <para>Delivers mail to virtual user's mail directories.</para>
763 <indexterm zone="postfix virtual">
764 <primary sortas="b-virtual">virtual</primary>
765 </indexterm>
766 </listitem>
767 </varlistentry>
768
769 </variablelist>
770
771 </sect2>
772
773</sect1>
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