You can create many rules to form a full set of rules, and then apply multiple rules to folders.
When you select the Manage Rules action for a folder with defined rules, the Rules page is split into two.
The left side of the page lists the rules that make up the rule set. If the folder inherits rules from a parent folder, those rules appear here too. The rules run in the order they're listed. Inherited rules are always run first.
A check mark to the left of the rule means it's active.
Selecting an individual rule in this list displays its details on the right side of the page.
See Troubleshooting rules and actions for information about resolving problems with rules.