I am moving emails from an old Mac to our new MacBook Pro. My wife has a LOT of mailboxes. It seems to me that when she imported her emails onto our old Mac, from an even older Mac, that mailboxes got duplicated. I think there are mailboxes and folders (with different names) that actually contain the same emails (or mostly the same) as other mailboxes and folders.
I've read some of the threads on the Apple Support Communities. I understand there is a script for finding duplicate emails. But will this only find duplicates within the same mailbox? I don't have this problem. I need to find duplicate mailboxes and duplicate emails within different mailboxes.