.TH POSTCONF 1 .ad .fi .SH NAME postconf \- Postfix configuration utility .SH "SYNOPSIS" .na .nf .fi \fBManaging main.cf:\fR \fBpostconf\fR [\fB-dfhnv\fR] [\fB-c \fIconfig_dir\fR] [\fB-C \fIclass,...\fR] [\fIparameter ...\fR] \fBpostconf\fR [\fB-ev\fR] [\fB-c \fIconfig_dir\fR] [\fIparameter=value ...\fR] \fBpostconf\fR [\fB-#v\fR] [\fB-c \fIconfig_dir\fR] [\fIparameter ...\fR] \fBManaging master.cf:\fR \fBpostconf\fR [\fB-fMv\fR] [\fB-c \fIconfig_dir\fR] [\fIservice ...\fR] \fBManaging bounce message templates:\fR \fBpostconf\fR [\fB-btv\fR] [\fB-c \fIconfig_dir\fR] [\fItemplate_file\fR] \fBManaging other configuration:\fR \fBpostconf\fR [\fB-aAlmv\fR] [\fB-c \fIconfig_dir\fR] .SH DESCRIPTION .ad .fi By default, the \fBpostconf\fR(1) command displays the values of \fBmain.cf\fR configuration parameters, and warns about possible mis-typed parameter names (Postfix 2.9 and later). It can also change \fBmain.cf\fR configuration parameter values, or display other configuration information about the Postfix mail system. Options: .IP \fB-a\fR List the available SASL server plug-in types. The SASL plug-in type is selected with the \fBsmtpd_sasl_type\fR configuration parameter by specifying one of the names listed below. .RS .IP \fBcyrus\fR This server plug-in is available when Postfix is built with Cyrus SASL support. .IP \fBdovecot\fR This server plug-in uses the Dovecot authentication server, and is available when Postfix is built with any form of SASL support. .RE .IP This feature is available with Postfix 2.3 and later. .IP \fB-A\fR List the available SASL client plug-in types. The SASL plug-in type is selected with the \fBsmtp_sasl_type\fR or \fBlmtp_sasl_type\fR configuration parameters by specifying one of the names listed below. .RS .IP \fBcyrus\fR This client plug-in is available when Postfix is built with Cyrus SASL support. .RE .IP This feature is available with Postfix 2.3 and later. .IP "\fB-b\fR [\fItemplate_file\fR]" Display the message text that appears at the beginning of delivery status notification (DSN) messages, replacing $\fBname\fR expressions with actual values as described in \fBbounce\fR(5). To override the built-in templates, specify a template file name at the end of the \fBpostconf\fR(1) command line, or specify a file name in \fBmain.cf\fR with the \fBbounce_template_file\fR parameter. To force selection of the built-in templates, specify an empty template file name on the \fBpostconf\fR(1) command line (in shell language: ""). This feature is available with Postfix 2.3 and later. .IP "\fB-c \fIconfig_dir\fR" The \fBmain.cf\fR configuration file is in the named directory instead of the default configuration directory. .IP "\fB-C \fIclass,...\fR" When displaying \fBmain.cf\fR parameters, select only parameters from the specified class(es): .RS .IP \fBbuiltin\fR Parameters with built-in names. .IP \fBservice\fR Parameters with service-defined names (the first field of a \fBmaster.cf\fR entry plus a Postfix-defined suffix). .IP \fBuser\fR Parameters with user-defined names. .IP \fBall\fR All the above classes. .RE .IP The default is as if "\fB-C all\fR" is specified. .IP \fB-d\fR Print \fBmain.cf\fR default parameter settings instead of actual settings. Specify \fB-df\fR to fold long lines for human readability (Postfix 2.9 and later). .IP \fB-e\fR Edit the \fBmain.cf\fR configuration file, and update parameter settings with the "\fIname\fR=\fIvalue\fR" pairs on the \fBpostconf\fR(1) command line. The file is copied to a temporary file then renamed into place. Specify quotes to protect special characters and whitespace on the \fBpostconf\fR(1) command line. The \fB-e\fR is no longer needed with Postfix version 2.8 and later. .IP \fB-f\fR Fold long lines when printing \fBmain.cf\fR or \fBmaster.cf\fR configuration file entries, for human readability. This feature is available with Postfix 2.9 and later. .IP \fB-h\fR Show \fBmain.cf\fR parameter values without the "\fIname\fR = " label that normally precedes the value. .IP \fB-l\fR List the names of all supported mailbox locking methods. Postfix supports the following methods: .RS .IP \fBflock\fR A kernel-based advisory locking method for local files only. This locking method is available on systems with a BSD compatible library. .IP \fBfcntl\fR A kernel-based advisory locking method for local and remote files. .IP \fBdotlock\fR An application-level locking method. An application locks a file named \fIfilename\fR by creating a file named \fIfilename\fB.lock\fR. The application is expected to remove its own lock file, as well as stale lock files that were left behind after abnormal termination. .RE .IP \fB-m\fR List the names of all supported lookup table types. In Postfix configuration files, lookup tables are specified as \fItype\fB:\fIname\fR, where \fItype\fR is one of the types listed below. The table \fIname\fR syntax depends on the lookup table type as described in the DATABASE_README document. .RS .IP \fBbtree\fR A sorted, balanced tree structure. This is available on systems with support for Berkeley DB databases. .IP \fBcdb\fR A read-optimized structure with no support for incremental updates. This is available on systems with support for CDB databases. .IP \fBcidr\fR A table that associates values with Classless Inter-Domain Routing (CIDR) patterns. This is described in \fBcidr_table\fR(5). .IP \fBdbm\fR An indexed file type based on hashing. This is available on systems with support for DBM databases. .IP \fBenviron\fR The UNIX process environment array. The lookup key is the variable name. Originally implemented for testing, someone may find this useful someday. .IP \fBfail\fR A table that reliably fails all requests. The lookup table name is used for logging. This table exists to simplify Postfix error tests. .IP \fBhash\fR An indexed file type based on hashing. This is available on systems with support for Berkeley DB databases. .IP \fBinternal\fR A non-shared, in-memory hash table. Its content are lost when a process terminates. .IP "\fBldap\fR (read-only)" Perform lookups using the LDAP protocol. This is described in \fBldap_table\fR(5). .IP "\fBmemcache\fR" Perform lookups using the memcache protocol. This is described in \fBmemcache_table\fR(5). .IP "\fBmysql\fR (read-only)" Perform lookups using the MYSQL protocol. This is described in \fBmysql_table\fR(5). .IP "\fBpcre\fR (read-only)" A lookup table based on Perl Compatible Regular Expressions. The file format is described in \fBpcre_table\fR(5). .IP "\fBpgsql\fR (read-only)" Perform lookups using the PostgreSQL protocol. This is described in \fBpgsql_table\fR(5). .IP "\fBproxy\fR" A lookup table that is implemented via the Postfix \fBproxymap\fR(8) service. The table name syntax is \fItype\fB:\fIname\fR. .IP "\fBregexp\fR (read-only)" A lookup table based on regular expressions. The file format is described in \fBregexp_table\fR(5). .IP \fBsdbm\fR An indexed file type based on hashing. This is available on systems with support for SDBM databases. .IP "\fBsqlite\fR (read-only)" Perform lookups from SQLite database files. This is described in \fBsqlite_table\fR(5). .IP "\fBstatic\fR (read-only)" A table that always returns its name as lookup result. For example, \fBstatic:foobar\fR always returns the string \fBfoobar\fR as lookup result. .IP "\fBtcp\fR (read-only)" Perform lookups using a simple request-reply protocol that is described in \fBtcp_table\fR(5). .IP "\fBtexthash\fR (read-only)" Produces similar results as hash: files, except that you don't need to run the \fBpostmap\fR(1) command before you can use the file, and that it does not detect changes after the file is read. .IP "\fBunix\fR (read-only)" A limited way to query the UNIX authentication database. The following tables are implemented: .RS . IP \fBunix:passwd.byname\fR The table is the UNIX password database. The key is a login name. The result is a password file entry in \fBpasswd\fR(5) format. .IP \fBunix:group.byname\fR The table is the UNIX group database. The key is a group name. The result is a group file entry in \fBgroup\fR(5) format. .RE .RE .IP Other table types may exist depending on how Postfix was built. .IP \fB-M\fR Show \fBmaster.cf\fR file contents instead of \fBmain.cf\fR file contents. Specify \fB-Mf\fR to fold long lines for human readability. If \fIservice ...\fR is specified, only the matching services will be output. For example, "\fBpostconf -Mf inet\fR" will output all services that listen on the network. Specify zero or more arguments, each with a \fIservice-type\fR name (\fBinet\fR, \fBunix\fR, \fBfifo\fR, or \fBpass\fR) or with a \fIservice-name.service-type\fR pair, where \fIservice-name\fR is the first field of a master.cf entry. This feature is available with Postfix 2.9 and later. .IP \fB-n\fR Print \fBmain.cf\fR parameter settings that are explicitly specified in \fBmain.cf\fR. Specify \fB-nf\fR to fold long lines for human readability (Postfix 2.9 and later). .IP "\fB-t\fR [\fItemplate_file\fR]" Display the templates for text that appears at the beginning of delivery status notification (DSN) messages, without expanding $\fBname\fR expressions. To override the built-in templates, specify a template file name at the end of the \fBpostconf\fR(1) command line, or specify a file name in \fBmain.cf\fR with the \fBbounce_template_file\fR parameter. To force selection of the built-in templates, specify an empty template file name on the \fBpostconf\fR(1) command line (in shell language: ""). This feature is available with Postfix 2.3 and later. .IP \fB-v\fR Enable verbose logging for debugging purposes. Multiple \fB-v\fR options make the software increasingly verbose. .IP \fB-#\fR Edit the \fBmain.cf\fR configuration file, and comment out the parameters given on the \fBpostconf\fR(1) command line, so that those parameters revert to their default values. The file is copied to a temporary file then renamed into place. Specify a list of parameter names, not \fIname\fR=\fIvalue\fR pairs. There is no \fBpostconf\fR(1) command to perform the reverse operation. This feature is available with Postfix 2.6 and later. .SH DIAGNOSTICS .ad .fi Problems are reported to the standard error stream. .SH "ENVIRONMENT" .na .nf .ad .fi .IP \fBMAIL_CONFIG\fR Directory with Postfix configuration files. .SH "CONFIGURATION PARAMETERS" .na .nf .ad .fi The following \fBmain.cf\fR parameters are especially relevant to this program. The text below provides only a parameter summary. See \fBpostconf\fR(5) for more details including examples. .IP "\fBconfig_directory (see 'postconf -d' output)\fR" The default location of the Postfix main.cf and master.cf configuration files. .IP "\fBbounce_template_file (empty)\fR" Pathname of a configuration file with bounce message templates. .SH "FILES" .na .nf /etc/postfix/main.cf, Postfix configuration parameters /etc/postfix/master.cf, Postfix master daemon configuraton .SH "SEE ALSO" .na .nf bounce(5), bounce template file format master(5), master.cf configuration file syntax postconf(5), main.cf configuration file syntax .SH "README FILES" .na .nf .ad .fi Use "\fBpostconf readme_directory\fR" or "\fBpostconf html_directory\fR" to locate this information. .na .nf DATABASE_README, Postfix lookup table overview .SH "LICENSE" .na .nf .ad .fi The Secure Mailer license must be distributed with this software. .SH "AUTHOR(S)" .na .nf Wietse Venema IBM T.J. Watson Research P.O. Box 704 Yorktown Heights, NY 10598, USA