GNU Mailutils
	General-Purpose Mail Package	Official GNU Software

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3.2.4 The program statement

Another way to configure program-specific settings is by using the program statement. The syntax is as follows:

program progname {
   ...
}

The program statement is allowed only in the site-wide configuration file. When encountered, its tag (progname) is compared with the name of the program being run. If two strings are the same, the statements between curly braces are stored in a temporary memory, otherwise the statement is ignored. When entire configuration file is loaded, the statements accumulated in the temporary storage are processed.

Notice the difference between this statement and a per-program configuration file loaded via an include statement. No matter where in the file the program statement is, its content will be processed after the content of the enclosing file. In the contrast, the per-program configuration file loaded via include is processed right where it is encountered.