When are Rules Evaluated?

When Gravity evaluates a rule varies depending on its conditions and actions. 
First, you must enable a rule (use the Rules dialog to do so).  When you receive an article header, Gravity tries to evaluate the rule. 
If the rule or related action applies to the article's body, Gravity defers the evaluation until it sees the body.
In general, Gravity evaluates enabled rules when you download each article's header.  Then, when you download the article's body, which may be in a different user session, Gravity performs any deferred rule condition evaluations or actions. If you have set the global storage mode to the Save article headers only option, then Gravity may not evaluate the rule until you explicitly download the article's body.

·      Do not "Enable" a rule if you do not want it applied to incoming articles (you intend to run the rule manually)