Postfix Configuration Parameters

Postfix file format

The Postfix configuration file specifies a very small subset of all the parameters that control the operation of the Postfix mail system. Parameters not explicitly specified are left at their default values.

The general format of the file is as follows:

The remainder of this document is a description of all Postfix configuration parameters. Default values are shown after the parameter name in parentheses, and can be looked up with the postconf -d command.

Note: this is not an invitation to make changes to Postfix configuration parameters. Unnecessary changes are likely to impair the operation of the mail system.