From a848231ae0f346dc7cc000973fbeb65b0894ee92 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 21:59:03 +0200 Subject: Adding upstream version 3.8.5. Signed-off-by: Daniel Baumann --- html/MYSQL_README.html | 187 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 187 insertions(+) create mode 100644 html/MYSQL_README.html (limited to 'html/MYSQL_README.html') diff --git a/html/MYSQL_README.html b/html/MYSQL_README.html new file mode 100644 index 0000000..ca0feb7 --- /dev/null +++ b/html/MYSQL_README.html @@ -0,0 +1,187 @@ + + + + + + +Postfix MySQL Howto + + + + + + + + +

Postfix MySQL Howto

+ +
+ +

Introduction

+ +

The Postfix mysql map type allows you to hook up Postfix to a +MySQL database. This implementation allows for multiple mysql +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 mysql maps will generate lots of +concurrent mysql clients, so the mysql server(s) should be run with +this fact in mind. You can reduce the number of concurrent mysql +clients by using the Postfix proxymap(8) service.

+ +

Building Postfix with MySQL support

+ +

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 mysql with Debian GNU/Linux's Postfix, all you +need is to install the postfix-mysql package and you're done. +There is no need to recompile Postfix.

+ +

The Postfix MySQL client utilizes the mysql client library, +which can be obtained from:

+ +
+

http://www.mysql.com/downloads/

+
+ +

In order to build Postfix with mysql map support, you will need to add +-DHAS_MYSQL and -I for the directory containing the mysql headers, and +the mysqlclient library (and libm) to AUXLIBS_MYSQL, for example:

+ +
+
+make -f Makefile.init makefiles \
+    "CCARGS=-DHAS_MYSQL -I/usr/local/mysql/include" \
+    "AUXLIBS_MYSQL=-L/usr/local/mysql/lib -lmysqlclient -lz -lm"
+
+
+ +

If your MySQL shared library is in a directory that the RUN-TIME +linker does not know about, add a "-Wl,-R,/path/to/directory" option after +"-lmysqlclient".

+ +

Postfix versions before 3.0 use AUXLIBS instead of AUXLIBS_MYSQL. +With Postfix 3.0 and later, the old AUXLIBS variable still supports +building a statically-loaded MySQL database client, but only the new +AUXLIBS_MYSQL variable supports building a dynamically-loaded or +statically-loaded MySQL database client.

+ +
+ +

Failure to use the AUXLIBS_MYSQL variable will defeat the purpose +of dynamic database client loading. Every Postfix executable file +will have MYSQL database library dependencies. And that was exactly +what dynamic database client loading was meant to avoid.

+ +
+ +

On Solaris, use this instead:

+ +
+
+make -f Makefile.init makefiles \
+    "CCARGS=-DHAS_MYSQL -I/usr/local/mysql/include" \
+    "AUXLIBS_MYSQL=-L/usr/local/mysql/lib -R/usr/local/mysql/lib \
+        -lmysqlclient -lz -lm"
+
+
+ +

Then, just run 'make'. This requires libz, the compression +library. Older mysql implementations build without libz.

+ +

Using MySQL tables

+ +

Once Postfix is built with mysql support, you can specify a +map type in main.cf like this:

+ +
+
+alias_maps = mysql:/etc/postfix/mysql-aliases.cf
+
+
+ +

The file /etc/postfix/mysql-aliases.cf specifies lots of +information telling Postfix how to reference the mysql database. +For a complete description, see the mysql_table(5) manual page.

+ +

Example: local aliases

+ +
+#
+# mysql config file for local(8) aliases(5) lookups
+#
+
+# The user name and password to log into the mysql server.
+user = someone
+password = some_password
+
+# The database name on the servers.
+dbname = customer_database
+
+# For Postfix 2.2 and later The SQL query template.
+# See mysql_table(5) for details.
+query = SELECT forw_addr FROM mxaliases WHERE alias='%s' AND status='paid'
+
+# For Postfix releases prior to 2.2. See mysql_table(5) for details.
+select_field = forw_addr
+table = mxaliases
+where_field = alias
+# Don't forget the leading "AND"!
+additional_conditions = AND status = 'paid'
+
+# This is necessary to make UTF8 queries work for Postfix 2.11 .. 3.1,
+# and is the default setting as of Postfix 3.2.
+option_group = client
+
+ +

Additional notes

+ +

Postfix 3.2 and later read [client] option group settings +by default. To disable this, specify no option_file and +specify "option_group =" (i.e. an empty value).

+ +

Postfix 3.1 and earlier don't read [client] option group +settings unless a non-empty option_file or option_group +value are specified. To enable this, specify, for example +"option_group = client".

+ +

The MySQL configuration interface setup allows for multiple +mysql databases: you can use one for a virtual table, one for an +access table, and one for an aliases table if you want.

+ +

Since 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, +we've included the ability to have Postfix reference multiple hosts +for access to a single mysql map. This will work if sites set up +mirrored mysql 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 mysql server hosts are reachable, then mail +will be deferred until at least one of those hosts is reachable. +

+ +

Credits

+ + + + + + -- cgit v1.2.3