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diff --git a/man/man5/pgsql_table.5 b/man/man5/pgsql_table.5 new file mode 100644 index 0000000..1501152 --- /dev/null +++ b/man/man5/pgsql_table.5 @@ -0,0 +1,342 @@ +.TH PGSQL_TABLE 5 +.ad +.fi +.SH NAME +pgsql_table +\- +Postfix PostgreSQL client configuration +.SH "SYNOPSIS" +.na +.nf +\fBpostmap \-q "\fIstring\fB" pgsql:/etc/postfix/\fIfilename\fR + +\fBpostmap \-q \- pgsql:/etc/postfix/\fIfilename\fB <\fIinputfile\fR +.SH DESCRIPTION +.ad +.fi +The Postfix mail system uses optional tables for address +rewriting or mail routing. These tables are usually in +\fBdbm\fR or \fBdb\fR format. + +Alternatively, lookup tables can be specified as PostgreSQL +databases. In order to use PostgreSQL lookups, define a +PostgreSQL source as a lookup table in main.cf, for example: +.nf + alias_maps = pgsql:/etc/postfix/pgsql\-aliases.cf +.fi + +The file /etc/postfix/pgsql\-aliases.cf has the same format as +the Postfix main.cf file, and can specify the parameters +described below. +.SH "LIST MEMBERSHIP" +.na +.nf +.ad +.fi +When using SQL to store lists such as $mynetworks, +$mydestination, $relay_domains, $local_recipient_maps, +etc., it is important to understand that the table must +store each list member as a separate key. The table lookup +verifies the *existence* of the key. See "Postfix lists +versus tables" in the DATABASE_README document for a +discussion. + +Do NOT create tables that return the full list of domains +in $mydestination or $relay_domains etc., or IP addresses +in $mynetworks. + +DO create tables with each matching item as a key and with +an arbitrary value. With SQL databases it is not uncommon to +return the key itself or a constant value. +.SH "PGSQL PARAMETERS" +.na +.nf +.ad +.fi +.IP "\fBhosts\fR" +The hosts that Postfix will try to connect to and query +from. Besides a \fBpostgresql://\fR connection URI, this +setting supports the historical forms \fBunix:/\fIpathname\fR +for UNIX\-domain sockets and \fBinet:\fIhost:port\fR for TCP +connections, where the \fBunix:\fR and \fBinet:\fR prefixes +are accepted and ignored for backwards compatibility. +Examples: +.nf + hosts = postgresql://username@example.com/tablename?sslmode=require + hosts = inet:host1.some.domain inet:host2.some.domain:port + hosts = host1.some.domain host2.some.domain:port + hosts = unix:/file/name +.fi + +The hosts are tried in random order. The connections are +automatically closed after being idle for about 1 minute, +and are re\-opened as necessary. +.IP "\fBuser, password\fR" +The user name and password to log into the pgsql server. +Example: +.nf + user = someone + password = some_password +.fi +.IP "\fBdbname\fR" +The database name on the servers. Example: +.nf + dbname = customer_database +.fi +.IP "\fBquery\fR" +The SQL query template used to search the database, where \fB%s\fR +is a substitute for the address Postfix is trying to resolve, +e.g. +.nf + query = SELECT replacement FROM aliases WHERE mailbox = '%s' +.fi + +This parameter supports the following '%' expansions: +.RS +.IP "\fB%%\fR" +This is replaced by a literal '%' character. (Postfix 2.2 and later) +.IP "\fB%s\fR" +This is replaced by the input key. +SQL quoting is used to make sure that the input key does not +add unexpected metacharacters. +.IP "\fB%u\fR" +When the input key is an address of the form user@domain, \fB%u\fR +is replaced by the SQL quoted local part of the address. +Otherwise, \fB%u\fR is replaced by the entire search string. +If the localpart is empty, the query is suppressed and returns +no results. +.IP "\fB%d\fR" +When the input key is an address of the form user@domain, \fB%d\fR +is replaced by the SQL quoted domain part of the address. +Otherwise, the query is suppressed and returns no results. +.IP "\fB%[SUD]\fR" +The upper\-case equivalents of the above expansions behave in the +\fBquery\fR parameter identically to their lower\-case counter\-parts. +With the \fBresult_format\fR parameter (see below), they expand the +input key rather than the result value. +.IP +The above %S, %U and %D expansions are available with Postfix 2.2 +and later +.IP "\fB%[1\-9]\fR" +The patterns %1, %2, ... %9 are replaced by the corresponding +most significant component of the input key's domain. If the +input key is \fIuser@mail.example.com\fR, then %1 is \fBcom\fR, +%2 is \fBexample\fR and %3 is \fBmail\fR. If the input key is +unqualified or does not have enough domain components to satisfy +all the specified patterns, the query is suppressed and returns +no results. +.IP +The above %1, ... %9 expansions are available with Postfix 2.2 +and later +.RE +.IP +The \fBdomain\fR parameter described below limits the input +keys to addresses in matching domains. When the \fBdomain\fR +parameter is non\-empty, SQL queries for unqualified addresses +or addresses in non\-matching domains are suppressed +and return no results. + +The precedence of this parameter has changed with Postfix 2.2, +in prior releases the precedence was, from highest to lowest, +\fBselect_function\fR, \fBquery\fR, \fBselect_field\fR, ... + +With Postfix 2.2 the \fBquery\fR parameter has highest precedence, +see OBSOLETE QUERY INTERFACES below. + +NOTE: DO NOT put quotes around the \fBquery\fR parameter. +.IP "\fBresult_format (default: \fB%s\fR)\fR" +Format template applied to result attributes. Most commonly used +to append (or prepend) text to the result. This parameter supports +the following '%' expansions: +.RS +.IP "\fB%%\fR" +This is replaced by a literal '%' character. +.IP "\fB%s\fR" +This is replaced by the value of the result attribute. When +result is empty it is skipped. +.IP "\fB%u\fR +When the result attribute value is an address of the form +user@domain, \fB%u\fR is replaced by the local part of the +address. When the result has an empty localpart it is skipped. +.IP "\fB%d\fR" +When a result attribute value is an address of the form +user@domain, \fB%d\fR is replaced by the domain part of +the attribute value. When the result is unqualified it +is skipped. +.IP "\fB%[SUD1\-9]\fR" +The upper\-case and decimal digit expansions interpolate +the parts of the input key rather than the result. Their +behavior is identical to that described with \fBquery\fR, +and in fact because the input key is known in advance, queries +whose key does not contain all the information specified in +the result template are suppressed and return no results. +.RE +.IP +For example, using "result_format = smtp:[%s]" allows one +to use a mailHost attribute as the basis of a transport(5) +table. After applying the result format, multiple values +are concatenated as comma separated strings. The expansion_limit +and parameter explained below allows one to restrict the number +of values in the result, which is especially useful for maps that +must return at most one value. + +The default value \fB%s\fR specifies that each result value should +be used as is. + +This parameter is available with Postfix 2.2 and later. + +NOTE: DO NOT put quotes around the result format! +.IP "\fBdomain (default: no domain list)\fR" +This is a list of domain names, paths to files, or "type:table" +databases. When specified, only fully qualified search +keys with a *non\-empty* localpart and a matching domain +are eligible for lookup: 'user' lookups, bare domain lookups +and "@domain" lookups are not performed. This can significantly +reduce the query load on the PostgreSQL server. +.nf + domain = postfix.org, hash:/etc/postfix/searchdomains +.fi + +It is best not to use SQL to store the domains eligible +for SQL lookups. + +This parameter is available with Postfix 2.2 and later. + +NOTE: DO NOT define this parameter for local(8) aliases, +because the input keys are always unqualified. +.IP "\fBexpansion_limit (default: 0)\fR" +A limit on the total number of result elements returned +(as a comma separated list) by a lookup against the map. +A setting of zero disables the limit. Lookups fail with a +temporary error if the limit is exceeded. Setting the +limit to 1 ensures that lookups do not return multiple +values. +.SH "OBSOLETE MAIN.CF PARAMETERS" +.na +.nf +.ad +.fi +For compatibility with other Postfix lookup tables, PostgreSQL +parameters can also be defined in main.cf. In order to do +that, specify as PostgreSQL source a name that doesn't begin +with a slash or a dot. The PostgreSQL parameters will then +be accessible as the name you've given the source in its +definition, an underscore, and the name of the parameter. For +example, if the map is specified as "pgsql:\fIpgsqlname\fR", +the parameter "hosts" would be defined in main.cf as +"\fIpgsqlname\fR_hosts". + +Note: with this form, the passwords for the PostgreSQL sources +are written in main.cf, which is normally world\-readable. +Support for this form will be removed in a future Postfix +version. +.SH "OBSOLETE QUERY INTERFACES" +.na +.nf +.ad +.fi +This section describes query interfaces that are deprecated +as of Postfix 2.2. Please migrate to the new \fBquery\fR +interface as the old interfaces are slated to be phased +out. +.IP "\fBselect_function\fR" +This parameter specifies a database function name. Example: +.nf + select_function = my_lookup_user_alias +.fi + +This is equivalent to: +.nf + query = SELECT my_lookup_user_alias('%s') +.fi + +This parameter overrides the legacy table\-related fields (described +below). With Postfix versions prior to 2.2, it also overrides the +\fBquery\fR parameter. Starting with Postfix 2.2, the \fBquery\fR +parameter has highest precedence, and the \fBselect_function\fR +parameter is deprecated. +.PP +The following parameters (with lower precedence than the +\fBselect_function\fR interface described above) can be used to +build the SQL select statement as follows: + +.nf + SELECT [\fBselect_field\fR] + FROM [\fBtable\fR] + WHERE [\fBwhere_field\fR] = '%s' + [\fBadditional_conditions\fR] +.fi + +The specifier %s is replaced with each lookup by the lookup key +and is escaped so if it contains single quotes or other odd +characters, it will not cause a parse error, or worse, a security +problem. + +Starting with Postfix 2.2, this interface is obsoleted by the more +general \fBquery\fR interface described above. If higher precedence +the \fBquery\fR or \fBselect_function\fR parameters described above +are defined, the parameters described here are ignored. +.IP "\fBselect_field\fR" +The SQL "select" parameter. Example: +.nf + \fBselect_field\fR = forw_addr +.fi +.IP "\fBtable\fR" +The SQL "select .. from" table name. Example: +.nf + \fBtable\fR = mxaliases +.fi +.IP "\fBwhere_field\fR +The SQL "select .. where" parameter. Example: +.nf + \fBwhere_field\fR = alias +.fi +.IP "\fBadditional_conditions\fR +Additional conditions to the SQL query. Example: +.nf + \fBadditional_conditions\fR = AND status = 'paid' +.fi +.SH "SEE ALSO" +.na +.nf +postmap(1), Postfix lookup table manager +postconf(5), configuration parameters +ldap_table(5), LDAP lookup tables +mysql_table(5), MySQL lookup tables +sqlite_table(5), SQLite lookup tables +.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 +PGSQL_README, Postfix PostgreSQL client guide +.SH "LICENSE" +.na +.nf +.ad +.fi +The Secure Mailer license must be distributed with this software. +.SH HISTORY +.ad +.fi +PgSQL support was introduced with Postfix version 2.1. +.SH "AUTHOR(S)" +.na +.nf +Based on the MySQL client by: +Scott Cotton, Joshua Marcus +IC Group, Inc. + +Ported to PostgreSQL by: +Aaron Sethman + +Further enhanced by: +Liviu Daia +Institute of Mathematics of the Romanian Academy +P.O. BOX 1\-764 +RO\-014700 Bucharest, ROMANIA |