Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 123 insertions, 0 deletions

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+PPoossttffiixx PPoossttggrreeSSQQLL HHoowwttoo
+
+-------------------------------------------------------------------------------
+
+IInnttrroodduuccttiioonn
+
+The Postfix pgsql map type allows you to hook up Postfix to a PostgreSQL
+database. This implementation allows for multiple pgsql databases: you can use
+one for a virtual(5) table, one for an access(5) table, and one for an aliases
+(5) table if you want. You can specify multiple servers for the same database,
+so that Postfix can switch to a good database server if one goes bad.
+
+Busy mail servers using pgsql maps will generate lots of concurrent pgsql
+clients, so the pgsql server(s) should be run with this fact in mind. You can
+reduce the number of concurrent pgsql clients by using the Postfix proxymap(8)
+service.
+
+BBuuiillddiinngg PPoossttffiixx wwiitthh PPoossttggrreeSSQQLL ssuuppppoorrtt
+
+These instructions assume that you build Postfix from source code as described
+in the INSTALL document. Some modification may be required if you build Postfix
+from a vendor-specific source package.
+
+Note: to use pgsql with Debian GNU/Linux's Postfix, all you need to do is to
+install the postfix-pgsql package and you're done. There is no need to
+recompile Postfix.
+
+In order to build Postfix with pgsql map support, you specify -DHAS_PGSQL, the
+directory with the PostgreSQL header files, and the location of the libpq
+library file.
+
+For example:
+
+    % make tidy
+    % make -f Makefile.init makefiles \
+            'CCARGS=-DHAS_PGSQL -I/usr/local/include/pgsql' \
+            'AUXLIBS_PGSQL=-L/usr/local/lib -lpq'
+
+Postfix versions before 3.0 use AUXLIBS instead of AUXLIBS_PGSQL. With Postfix
+3.0 and later, the old AUXLIBS variable still supports building a statically-
+loaded PostgreSQL database client, but only the new AUXLIBS_PGSQL variable
+supports building a dynamically-loaded or statically-loaded PostgreSQL database
+client.
+
+    Failure to use the AUXLIBS_PGSQL variable will defeat the purpose of
+    dynamic database client loading. Every Postfix executable file will have
+    PGSQL database library dependencies. And that was exactly what dynamic
+    database client loading was meant to avoid.
+
+Then just run 'make'.
+
+CCoonnffiigguurriinngg PPoossttggrreeSSQQLL llooookkuupp ttaabblleess
+
+Once Postfix is built with pgsql support, you can specify a map type in main.cf
+like this:
+
+    /etc/postfix/main.cf:
+        alias_maps = pgsql:/etc/postfix/pgsql-aliases.cf
+
+The file /etc/postfix/pgsql-aliases.cf specifies lots of information telling
+postfix how to reference the pgsql database. For a complete description, see
+the pgsql_table(5) manual page.
+
+EExxaammppllee:: llooccaall aalliiaasseess
+
+#
+# pgsql config file for local(8) aliases(5) lookups
+#
+
+#
+# The hosts that Postfix will try to connect to
+hosts = host1.some.domain host2.some.domain
+
+# The user name and password to log into the pgsql server.
+user = someone
+password = some_password
+
+# The database name on the servers.
+dbname = customer_database
+
+# Postfix 2.2 and later The SQL query template. See pgsql_table(5).
+query = SELECT forw_addr FROM mxaliases WHERE alias='%s' AND status='paid'
+
+# For Postfix releases prior to 2.2. See pgsql_table(5) for details.
+select_field = forw_addr
+table = mxaliases
+where_field = alias
+# Don't forget the leading "AND"!
+additional_conditions = AND status = 'paid'
+
+UUssiinngg mmiirrrroorreedd ddaattaabbaasseess
+
+Sites that have a need for multiple mail exchangers may enjoy the convenience
+of using a networked mailer database, but do not want to introduce a single
+point of failure to their system.
+
+For this reason we've included the ability to have Postfix reference multiple
+hosts for access to a single pgsql map. This will work if sites set up mirrored
+pgsql databases on two or more hosts.
+
+Whenever queries fail with an error at one host, the rest of the hosts will be
+tried in random order. If no pgsql server hosts are reachable, then mail will
+be deferred until at least one of those hosts is reachable.
+
+CCrreeddiittss
+
+  * This code is based upon the Postfix mysql map by Scott Cotton and Joshua
+    Marcus, IC Group, Inc.
+  * The PostgreSQL changes were done by Aaron Sethman.
+  * Updates for Postfix 1.1.x and PostgreSQL 7.1+ and support for calling
+    stored procedures were added by Philip Warner.
+  * LaMont Jones was the initial Postfix pgsql maintainer.
+  * Liviu Daia revised the configuration interface and added the main.cf
+    configuration feature.
+  * Liviu Daia revised the configuration interface and added the main.cf
+    configuration feature.
+  * Liviu Daia with further refinements from Jose Luis Tallon and Victor
+    Duchovni developed the common query, result_format, domain and
+    expansion_limit interface for LDAP, MySQL and PosgreSQL.
+  * Leandro Santi updated the PostgreSQL client after the PostgreSQL developers
+    made major database API changes in response to SQL injection problems, and
+    made PQexec() handling more robust.
+