POSTCONF(1) POSTCONF(1)
NAME
postconf - Postfix configuration utility
SYNOPSIS
postconf [-dhmlnv] [-c config_dir] [parameter ...]
postconf [-ev] [-c config_dir] [parameter=value ...]
DESCRIPTION
The postconf(1) command prints the actual value of parame-
ter (all known parameters by default) one parameter per
line, changes its value, or prints other information about
the Postfix mail system.
Options:
-c config_dir
The main.cf configuration file is in the named
directory instead of the default configuration
directory.
-d Print default parameter settings instead of actual
settings.
-e Edit the main.cf 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.
-h Show parameter values only, not the ``name = ''
label that normally precedes the value.
-l List the names of all supported mailbox locking
methods. Postfix supports the following methods:
flock A kernel-based advisory locking method for
local files only. This locking method is
available on systems with a BSD compatible
library.
fcntl A kernel-based advisory locking method for
local and remote files.
dotlock
An application-level locking method. An
application locks a file named filename by
creating a file named filename.lock. The
application is expected to remove its own
lock file, as well as stale lock files that
were left behind after abnormal termination.
-m List the names of all supported lookup table types.
In Postfix configuration files, lookup tables are
specified as type:name, where type is one of the
types listed below. The table name syntax depends
on the lookup table type as described in the
DATABASE_README document.
btree A sorted, balanced tree structure. This is
available on systems with support for Berke-
ley DB databases.
cdb A read-optimized structure with no support
for incremental updates. This is available
on systems with support for CDB databases.
cidr A table that associates values with Class-
less Inter-Domain Routing (CIDR) patterns.
This is described in cidr_table(5).
dbm An indexed file type based on hashing. This
is available on systems with support for DBM
databases.
environ
The UNIX process environment array. The
lookup key is the variable name. Originally
implemented for testing, someone may find
this useful someday.
hash An indexed file type based on hashing. This
is available on systems with support for
Berkeley DB databases.
ldap (read-only)
Perform lookups using the LDAP protocol.
This is described in ldap_table(5).
mysql (read-only)
Perform lookups using the MYSQL protocol.
This is described in mysql_table(5).
pcre (read-only)
A lookup table based on Perl Compatible Reg-
ular Expressions. The file format is
described in pcre_table(5).
pgsql (read-only)
Perform lookups using the PostgreSQL proto-
col. This is described in pgsql_table(5).
proxy (read-only)
A lookup table that is implemented via the
Postfix proxymap(8) service. The table name
syntax is type:name.
regexp (read-only)
A lookup table based on regular expressions.
The file format is described in reg-
exp_table(5).
sdbm An indexed file type based on hashing. This
is available on systems with support for
SDBM databases.
static (read-only)
A table that always returns its name as
lookup result. For example, static:foobar
always returns the string foobar as lookup
result.
tcp (read-only)
Perform lookups using a simple request-reply
protocol that is described in tcp_table(5).
This feature is not included with Postfix
2.1.
unix (read-only)
A limited way to query the UNIX authentica-
tion database. The following tables are
implemented:
unix:passwd.byname
The table is the UNIX password
database. The key is a login name.
The result is a password file entry
in passwd(5) format.
unix:group.byname
The table is the UNIX group
database. The key is a group name.
The result is a group file entry in
group(5) format.
Other table types may exist depending on how Postfix was
built.
-n Print parameter settings that are not left at their
built-in default value, because they are explicitly
specified in main.cf.
-v Enable verbose logging for debugging purposes. Mul-
tiple -v options make the software increasingly
verbose.
DIAGNOSTICS
Problems are reported to the standard error stream.
ENVIRONMENT
MAIL_CONFIG
Directory with Postfix configuration files.
CONFIGURATION PARAMETERS
The following main.cf parameters are especially relevant
to this program.
The text below provides only a parameter summary. See
postconf(5) for more details including examples.
config_directory (see 'postconf -d' output)
The default location of the Postfix main.cf and
master.cf configuration files.
FILES
/etc/postfix/main.cf, Postfix configuration parameters
SEE ALSO
postconf(5), configuration parameters
README FILES
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
POSTCONF(1)