""> MYSQL_TABLE(5) MYSQL_TABLE(5) NAME mysql_table - Postfix MySQL client configuration SYNOPSIS postmap -q "string" mysql:/usr/local/etc/postfix/filename postmap -q - mysql:/usr/local/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, for example: alias_maps = mysql:/etc/ The file /usr/local/etc/postfix/ has the same format as the Postfix file, and can specify the parame- ters described below. ALTERNATIVE CONFIGURATION For compatibility with other Postfix lookup tables, MySQL parameters can also be defined in 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 def- inition, 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 as "mysqlname_hosts". Note: with this form, the passwords for the MySQL sources are written in, 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, $mydes- tination, $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 $mynetworks. DO create tables with each matching item as a key and with an arbitrary value. With SQL databases it is not uncommon to return the key itself or a constant value. MYSQL PARAMETERS hosts The hosts that Postfix will try to connect to and query from. Specify unix: for UNIX domain sockets, inet: for TCP connections (default). Example: hosts = host1.some.domain host2.some.domain hosts = unix:/file/name The hosts are tried in random order, with all con- nections over UNIX domain sockets being tried before those over TCP. The connections are auto- matically closed after being idle for about 1 minute, and are re-opened as necessary. Postfix versions 2.0 and earlier do not randomize the host order. NOTE: if you specify localhost as a hostname (even if you prefix it with inet:), MySQL will connect to the default UNIX domain socket. In order to instruct MySQL to connect to localhost over TCP you have to specify hosts = user, password The user name and password to log into the mysql server. Example: user = someone password = some_password dbname The database name on the servers. Example: dbname = customer_database The following parameters are used to fill in a SELECT query template of the form: select [select_field] from [table] where [where_field] = '$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 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 MYSQL_TABLE(5)