The rule system is a core part of GNU Anubis. It can be regarded as a program that is executed for every outgoing message.
Throughout this chapter, when showing syntax definitions, their optional parts will be enclosed in a pair of square brackets, e.g.:
keyword [optional-part] mandatory-part
When the square braces are required symbols, they will be marked as such, e.g.:
remove ‘[’key‘]’
The rule system is defined in the RULE section. The statements within this section are executed sequentially. Each statement is either an action or a conditional statement.
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