Here is a screenshot of my Mail.app folders. I don't like - or understand - the way it's set up. For instance, why under Mailboxes > Trash do I have two trashcans: uchicago and On My Mac? Then I have two more trashcans under Uchicago: Imap>Trash and just Trash. I also have two Junk folders and two sent folders. For that matter, why isn't my account Uchicago just incorporated under Mailboxes - don't really get the need for it being separate. As is, my incoming mail goes to Mailboxes>Inbox while my sent mail is in Uchicago>Sent. I can make no rhyme nor reason of it.