A global rule would be too much of a good thing? Simply create rules for a single account.
The SmartPOP2Exchange rule system reads and processes text. This way, certain freely definable character sequences will be recognized. Each email showing the string in their header or body will be processed according to your definition.
Your webshop creates an email alert for each order and sends it to your sales team. The headers of these emails always contain the sequence "order number:" and a variable number. SmartPOP2Exchange reads the header and moves each email containing "order number:" in the "open orders" account to ensure a quick response.
Please note: This rule will be applied whenever the header contains "order number:" - even if the email in question is no new order, but - for instance - a customer's answer to one of your emails.