Five major Internet Message Transfer Agent (IMTA) configuration files are supported by Sun Internet Mail Server 3.5 to be editable with any text editor.

imta.cnf

mappings

option.dat

job_controller.cnf

dispatcher.cnf

Configuration modifications can be done using the command-line interface, as described in this manual, or by using the accompanying Graphical User Interface (GUI), as described in the Sun Internet Mail Server 3.5 System Administrator's Guide.

This section explains how to modify the IMTA configuration files to obtain behaviors not directly configurable from the Java administration front end. Sun recommends that only experienced administrators edit and modify the configuration files. Configuration settings can be defined using the GUI described in the Sun Internet Mail Server System Administrator's Guide. The command-line options for configuring your system are described in the following sections and in Chapter 2, "Commands Reference."

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Note - If you do change any of the files manually, be sure to restart your administration server after you make the changes. Then restart the administration console. This will ensure that the information that you changed in the imta.cnf file get synchronized in the administration console.

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All configuration files are ASCII text files that can be created or changed with any text editor. Permissions for the configuration file should be set to world-readable. Failure to make configuration files world-readable may cause unexpected IMTA failures. A physical line in the files is limited to 252 characters. You can split a logical line into multiple physical lines using the backslash (\) continuation character.

By pre-processing these files and storing them into an image, the initialization time for IMTA is significantly reduced, thereby improving IMTA's performance.