1QMQPD(8) System Manager's Manual QMQPD(8)
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6 qmqpd - Postfix QMQP server
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9 qmqpd [generic Postfix daemon options]
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12 The Postfix QMQP server receives one message per connection. Each mes‐
13 sage is piped through the cleanup(8) daemon, and is placed into the in‐
14 coming queue as one single queue file. The program expects to be run
15 from the master(8) process manager.
16 The QMQP server implements one access policy: only explicitly autho‐
18 rized client hosts are allowed to use the service.
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21 The QMQP server is moderately security-sensitive. It talks to QMQP
22 clients and to DNS servers on the network. The QMQP server can be run
23 chrooted at fixed low privilege.
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26 Problems and transactions are logged to syslogd(8) or postlogd(8).
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29 The QMQP protocol provides only one server reply per message delivery.
30 It is therefore not possible to reject individual recipients.
31 The QMQP protocol requires the server to receive the entire message be‐
33 fore replying. If a message is malformed, or if any netstring component
34 is longer than acceptable, Postfix replies immediately and closes the
35 connection. It is left up to the client to handle the situation.
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38 Changes to main.cf are picked up automatically, as qmqpd(8) processes
39 run for only a limited amount of time. Use the command "postfix reload"
40 to speed up a change.
41 The text below provides only a parameter summary. See postconf(5) for
43 more details including examples.
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46 content_filter (empty)
47 After the message is queued, send the entire message to the
48 specified transport:destination.
49 receive_override_options (empty)
51 Enable or disable recipient validation, built-in content filter‐
52 ing, or address mapping.
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55 Preliminary SMTPUTF8 support is introduced with Postfix 3.0.
56 smtputf8_enable (yes)
58 Enable preliminary SMTPUTF8 support for the protocols described
59 in RFC 6531..6533.
60 smtputf8_autodetect_classes (sendmail, verify)
62 Detect that a message requires SMTPUTF8 support for the speci‐
63 fied mail origin classes.
64 Available in Postfix version 3.2 and later:
66 enable_idna2003_compatibility (no)
68 Enable 'transitional' compatibility between IDNA2003 and
69 IDNA2008, when converting UTF-8 domain names to/from the ASCII
70 form that is used for DNS lookups.
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73 line_length_limit (2048)
74 Upon input, long lines are chopped up into pieces of at most
75 this length; upon delivery, long lines are reconstructed.
76 hopcount_limit (50)
78 The maximal number of Received: message headers that is allowed
79 in the primary message headers.
80 message_size_limit (10240000)
82 The maximal size in bytes of a message, including envelope in‐
83 formation.
84 qmqpd_timeout (300s)
86 The time limit for sending or receiving information over the
87 network.
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90 debug_peer_level (2)
91 The increment in verbose logging level when a nexthop destina‐
92 tion, remote client or server name or network address matches a
93 pattern given with the debug_peer_list parameter.
94 debug_peer_list (empty)
96 Optional list of nexthop destination, remote client or server
97 name or network address patterns that, if matched, cause the
98 verbose logging level to increase by the amount specified in
99 $debug_peer_level.
100 soft_bounce (no)
102 Safety net to keep mail queued that would otherwise be returned
103 to the sender.
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106 qmqpd_error_delay (1s)
107 How long the Postfix QMQP server will pause before sending a
108 negative reply to the remote QMQP client.
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111 config_directory (see 'postconf -d' output)
112 The default location of the Postfix main.cf and master.cf con‐
113 figuration files.
114 daemon_timeout (18000s)
116 How much time a Postfix daemon process may take to handle a re‐
117 quest before it is terminated by a built-in watchdog timer.
118 ipc_timeout (3600s)
120 The time limit for sending or receiving information over an in‐
121 ternal communication channel.
122 max_idle (100s)
124 The maximum amount of time that an idle Postfix daemon process
125 waits for an incoming connection before terminating voluntarily.
126 max_use (100)
128 The maximal number of incoming connections that a Postfix daemon
129 process will service before terminating voluntarily.
130 process_id (read-only)
132 The process ID of a Postfix command or daemon process.
133 process_name (read-only)
135 The process name of a Postfix command or daemon process.
136 qmqpd_authorized_clients (empty)
138 What remote QMQP clients are allowed to connect to the Postfix
139 QMQP server port.
140 queue_directory (see 'postconf -d' output)
142 The location of the Postfix top-level queue directory.
143 syslog_facility (mail)
145 The syslog facility of Postfix logging.
146 syslog_name (see 'postconf -d' output)
148 A prefix that is prepended to the process name in syslog
149 records, so that, for example, "smtpd" becomes "prefix/smtpd".
150 verp_delimiter_filter (-=+)
152 The characters Postfix accepts as VERP delimiter characters on
153 the Postfix sendmail(1) command line and in SMTP commands.
154 Available in Postfix version 2.5 and later:
156 qmqpd_client_port_logging (no)
158 Enable logging of the remote QMQP client port in addition to the
159 hostname and IP address.
160 Available in Postfix 3.3 and later:
162 service_name (read-only)
164 The master.cf service name of a Postfix daemon process.
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167 http://cr.yp.to/proto/qmqp.html, QMQP protocol
168 cleanup(8), message canonicalization
169 master(8), process manager
170 postlogd(8), Postfix logging
171 syslogd(8), system logging
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174 Use "postconf readme_directory" or "postconf html_directory" to locate
175 this information.
176 QMQP_README, Postfix ezmlm-idx howto.
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179 The Secure Mailer license must be distributed with this software.
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182 The qmqpd service was introduced with Postfix version 1.1.
183
185 Wietse Venema
186 IBM T.J. Watson Research
187 P.O. Box 704
188 Yorktown Heights, NY 10598, USA
189 Wietse Venema
191 Google, Inc.
192 111 8th Avenue
193 New York, NY 10011, USA
194 QMQPD(8)