This is the custom workflow I created using smart rules. I work for a 3rd Party Logistics Company and we have our own internal system for managing and updating shipments. I happened to notice that the URL for each shipment in our system was the exact same and only the shipment number listed in the URL is what changed. For each new incoming/outgoing email, the rule searches the subject line for reference number that starts with “s” followed by digits. If said number does exist, it will copy that number and paste it into the already existing text and complete the URL link that will direct you to that very same shipment page in our system. I hope this helps!