Local macro definitions

The standard sendmail macro configuration files provide lots of hooks and variables with which you can customize your configuration. These are called local macro definitions. Many of them are listed in the CF file in the sendmail source package.

The local macro definitions are usually invoked by supplying the name of the macro with an argument representing the value you wish to assign to the variable the macro manages. Again, we'll explore some of the more common local macro definitions in the examples we present later in the chapter.