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Postfix Documentation
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Postfix MySQL Howto


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.

Postfix Documentation
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