I would like an easy way to add tracking numbers for outgoing correspondence that we send. We use Projects for management of tasks like this, but there is no way in Projects to dedicate a field to all our correspondence tracking numbers unless we do this under a task list and that seems off. I had thought about creating a custom module in CRM to house this information, but the information would be static. After one entry would be made there would not be another field to put in another tracking number unless i built out numerous fields for tracking numbers that don't yet exist. 

Any ideas anyone?