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diff --git a/README_FILES/PGSQL_README b/README_FILES/PGSQL_README new file mode 100644 index 0000000..ae9c3bf --- /dev/null +++ b/README_FILES/PGSQL_README @@ -0,0 +1,126 @@ +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' + +If your PostgreSQL shared library is in a directory that the RUN-TIME linker +does not know about, add a "-Wl,-R,/path/to/directory" option after "-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. + |