NAME

postconf - Postfix configuration utility

SYNOPSIS



ppoossttccoonnff [--ddhhnnvv] [--cc _c_o_n_f_i_g___d_i_r]
[_p_a_r_a_m_e_t_e_r _._._.]
        

ppoossttccoonnff [--aaAAmmllvv] [--cc _c_o_n_f_i_g___d_i_r]

ppoossttccoonnff [--eevv] [--cc _c_o_n_f_i_g___d_i_r] [_p_a_r_a_m_e_t_e_r_=_v_a_l_u_e _._._.]

ppoossttccoonnff [--##vv] [--cc _c_o_n_f_i_g___d_i_r] [_p_a_r_a_m_e_t_e_r _._._.]

ppoossttccoonnff [--bbttvv] [--cc _c_o_n_f_i_g___d_i_r] [_t_e_m_p_l_a_t_e___f_i_l_e]

DESCRIPTION

The ppoossttccoonnff(1) command displays the actual values of configuration parameters, changes configuration parameter values, or displays other configuration information about the Postfix mail system.

Options:

--aa List the available SASL server plug-in types. The SASL
plug-in type is selected with the ssmmttppdd__ssaassll__ttyyppee configuration parameter by specifying one of the names listed below.
ccyyrruuss This server plug-in is available when Postfix is built with
Cyrus SASL support.
ddoovveeccoott This server plug-in uses the Dovecot authentication server,
and is available when Postfix is built with any form of SASL support.
This feature is available with Postfix 2.3 and later.
--AA List the available SASL client plug-in types. The SASL
plug-in type is selected with the ssmmttpp__ssaassll__ttyyppee or llmmttpp__ssaassll__ttyyppee configuration parameters by specifying one of the names listed below.
ccyyrruuss This client plug-in is available when Postfix is built with
Cyrus SASL support.
This feature is available with Postfix 2.3 and later.
--bb [_t_e_m_p_l_a_t_e___f_i_l_e] Display the message text that appears at the beginning of
delivery status notification (DSN) messages, with $nnaammee expressions replaced by actual values. To override the built-in message text, specify a template file at the end of the command line, or specify a template file in main.cf with the bboouunnccee__tteemmppllaattee__ffiillee parameter. To force selection of the built-in message text templates, specify an empty template file name (in shell language: "").

This feature is available with Postfix 2.3 and later.

--cc _c_o_n_f_i_g___d_i_r The mmaaiinn..ccff configuration file is in the named directory
instead of the default configuration directory.
--dd Print default parameter settings instead of actual settings.
--ee Edit the mmaaiinn..ccff configuration file. The file is copied
to a temporary file then renamed into place. Parameters and values are specified on the command line. Use quotes in order to protect shell metacharacters and whitespace.
--hh Show parameter values only, not the ``name = '' label
that normally precedes the value.
--ll List the names of all supported mailbox locking methods.
Postfix supports the following methods:
fflloocckk A kernel-based advisory locking method for local files only.
This locking method is available on systems with a BSD compatible library.
ffccnnttll A kernel-based advisory locking method for local and remote files.
ddoottlloocckk An application-level locking method. An application locks a file
named _f_i_l_e_n_a_m_e by creating a file named _f_i_l_e_n_a_m_e..lloocckk. The application is expected to remove its own lock file, as well as stale lock files that were left behind after abnormal termination.
--mm List the names of all supported lookup table types. In Postfix
configuration files, lookup tables are specified as _t_y_p_e::_n_a_m_e, where _t_y_p_e is one of the types listed below. The table _n_a_m_e syntax depends on the lookup table type as described in the DATABASE_README document.
bbttrreeee A sorted, balanced tree structure.
This is available on systems with support for Berkeley DB databases.
ccddbb A read-optimized structure with no support for incremental updates.
This is available on systems with support for CDB databases.
cciiddrr A table that associates values with Classless Inter-Domain Routing
(CIDR) patterns. This is described in cciiddrr__ttaabbllee(5).
ddbbmm An indexed file type based on hashing.
This is available on systems with support for DBM databases.
eennvviirroonn The UNIX process environment array. The lookup key is the variable
name. Originally implemented for testing, someone may find this useful someday.
hhaasshh An indexed file type based on hashing.
This is available on systems with support for Berkeley DB databases.
llddaapp (read-only) Perform lookups using the LDAP protocol. This is described
in llddaapp__ttaabbllee(5).
mmyyssqqll (read-only) Perform lookups using the MYSQL protocol. This is described
in mmyyssqqll__ttaabbllee(5).
ppccrree (read-only) A lookup table based on Perl Compatible Regular Expressions. The
file format is described in ppccrree__ttaabbllee(5).
ppggssqqll (read-only) Perform lookups using the PostgreSQL protocol. This is described
in ppggssqqll__ttaabbllee(5).
pprrooxxyy (read-only) A lookup table that is implemented via the Postfix
pprrooxxyymmaapp(8) service. The table name syntax is _t_y_p_e::_n_a_m_e.
rreeggeexxpp (read-only) A lookup table based on regular expressions. The file format is
described in rreeggeexxpp__ttaabbllee(5).
ssddbbmm An indexed file type based on hashing.
This is available on systems with support for SDBM databases.
ssttaattiicc (read-only) A table that always returns its name as lookup result. For example,
ssttaattiicc::ffoooobbaarr always returns the string ffoooobbaarr as lookup result.
ttccpp (read-only) Perform lookups using a simple request-reply protocol that is
described in ttccpp__ttaabbllee(5). This feature is not included with the stable Postfix release.
uunniixx (read-only) A limited way to query the UNIX authentication database. The
following tables are implemented:
uunniixx::ppaasssswwdd..bbyynnaammee The table is the UNIX password database. The key is a login name.
The result is a password file entry in ppaasssswwdd(5) format.
uunniixx::ggrroouupp..bbyynnaammee The table is the UNIX group database. The key is a group name.
The result is a group file entry in ggrroouupp(5) format.
Other table types may exist depending on how Postfix was built.
--nn Print parameter settings that are not left at their built-in
default value, because they are explicitly specified in main.cf.
--tt [_t_e_m_p_l_a_t_e___f_i_l_e] Display the templates for delivery status notification (DSN)
messages. To override the built-in templates, specify a template file at the end of the command line, or specify a template file in main.cf with the bboouunnccee__tteemmppllaattee__ffiillee parameter. To force selection of the built-in templates, specify an empty template file name (in shell language: "").

This feature is available with Postfix 2.3 and later.

--vv Enable verbose logging for debugging purposes. Multiple --vv
options make the software increasingly verbose.
--## Edit the mmaaiinn..ccff configuration file. The file is copied
to a temporary file then renamed into place. The parameters specified on the command line are commented-out, so that they revert to their default values. Specify a list of parameter names, not name=value pairs. There is no ppoossttccoonnff command to perform the reverse operation.

This feature is available with Postfix 2.6 and later.

DIAGNOSTICS

Problems are reported to the standard error stream.

ENVIRONMENT



MMAAIILL__CCOONNFFIIGG Directory with Postfix configuration files.

CONFIGURATION PARAMETERS



The following mmaaiinn..ccff parameters are especially relevant to
this program.
        

The text below provides only a parameter summary. See ppoossttccoonnff(5) for more details including examples.

ccoonnffiigg__ddiirreeccttoorryy ((sseeee ''ppoossttccoonnff --dd'' oouuttppuutt)) The default location of the Postfix main.cf and master.cf
configuration files.
bboouunnccee__tteemmppllaattee__ffiillee ((eemmppttyy)) Pathname of a configuration file with bounce message templates.

FILES


/etc/postfix/main.cf, Postfix configuration parameters

SEE ALSO


bounce(5), bounce template file format
postconf(5), configuration parameters

README FILES



Use "ppoossttccoonnff rreeaaddmmee__ddiirreeccttoorryy" or
"ppoossttccoonnff hhttmmll__ddiirreeccttoorryy" to locate this information.

DATABASE_README, Postfix lookup table overview

LICENSE



The Secure Mailer license must be distributed with this software.

AUTHOR(S)


Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA