MYSQL_TABLE(5)

NAME
mysql_table - Postfix MySQL client configuration

SYNOPSIS
postmap -q "string" mysql:/etc/postfix/filename
postmap -q - mysql:/etc/postfix/filename <inputfile

DESCRIPTION
The Postfix mail system uses optional tables for address rewriting or mail routing. These tables are usually in dbm or db format. Alternatively, lookup tables can be specified as MySQL databases. In order to use MySQL lookups, define a MySQL source as a lookup table in main.cf, for example:
alias_maps = mysql:/etc/mysql-aliases.cf The file /etc/postfix/mysql-aliases.cf has the same format as the Postfix main.cf file, and can specify the parameters described below.

ALTERNATIVE CONFIGURATION
For compatibility with other Postfix lookup tables, MySQL parameters can also be defined in main.cf. In order to do that, specify as MySQL source a name that doesn't begin with a slash or a dot. The MySQL 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 "mysql:mysqlname", the parameter "hosts" below would be defined in main.cf as "mysqlname_hosts". Note: with this form, the passwords for the MySQL sources are written in main.cf, which is normally world-readable. Support for this form will be removed in a future Postfix version.

LIST MEMBERSHIP
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.

MYSQL PARAMETERS

hosts
    The hosts that Postfix will try to connect to and query from. Specify unix: for UNIX domain sockets, inet: for TCP connections (default). Example:
    hosts = host1.some.domain host2.some.domain
    hosts = unix:/file/name The hosts are tried in random order, with all connections over UNIX domain sockets being tried before those over TCP. The connections are automatically closed after being idle for about 1 minute, and are re-opened as necessary. Postfix versions 2.0 and earlier do not randomize the host order. NOTE: if you specify localhost as a hostname (even if you prefix it with inet:), MySQL will connect to the default UNIX domain socket. In order to instruct MySQL to connect to localhost over TCP you have to specify
    hosts = 127.0.0.1

user, password
    The user name and password to log into the mysql server. Example:
    user = someone
    password = some_password

dbname
    The database name on the servers. Example:
    dbname = customer_database

The following parameters are used to fill in a SELECT query template of the form:
select [select_field] from [table] where
[where_field] = '$lookup' [additional_conditions] $lookup contains the search string, 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.

select_field
    The SQL "select" parameter. Example:
    select_field = forw_addr

table
    The SQL "select .. from" table name. Example:
    table = mxaliases

where_field
    The SQL "select .. where" parameter. Example:
    where_field = alias

additional_conditions
    Additional conditions to the SQL query. Example:
    additional_conditions = and status = 'paid'

SEE ALSO
postmap(1), Postfix lookup table maintenance
postconf(5), configuration parameters
ldap_table(5), LDAP lookup tables
pgsql_table(5), PostgreSQL lookup tables

README FILES
Use "postconf readme_directory" or "postconf html_directory" to locate this information.
DATABASE_README, Postfix lookup table overview
MYSQL_README, Postfix MYSQL client guide

LICENSE
The Secure Mailer license must be distributed with this software.

HISTORY
MySQL support was introduced with Postfix version 1.0.

AUTHOR(S)
Original implementation by:
Scott Cotton, Joshua Marcus
IC Group, Inc.
Further enhancements by:
Liviu Daia
Institute of Mathematics of the Romanian Academy
P.O. BOX 1-764
RO-014700 Bucharest, ROMANIA