### 5.3 Preprocessor ¶

Preprocessor statements are a GNU extension to the Sieve language. The syntax for a preprocessor statement is similar to that used in `C` programming language, i.e. a pound character (‘`#`’) followed by a preprocessor directive and its arguments. Any amount of whitespace can be inserted between the ‘`#`’ and the directive. Currently implemented directives are `include` and `searchpath`.