Automatic rules for a given client are evaluated whenever that client synchronizes and at the automatic rule evaluation period.

Scheduled rules for a given client are evaluated on the specified schedule.

The evaluation of a rule causes push notifications to be sent to clients that currently have messages satisfying the rule conditions.

Every time a client synchronizes, messages that satisfy conditions of automatic rules for that client are transmitted to the client.

If and only if a scheduled rule has caused a push notification to be sent to a client since the last time that client synchronized, all messages satisfying the condition of the scheduled rule at the time of the next synchronization are transmitted to the client.