I have now successfully imported a couple of my Apple Mail mailboxes, but then, after a process I’m too embarrassed to describe, I have wound up with all the messages that had been in Mail’s “Sent” mailbox residing in an EF folder as individual .eml files, not an mbox. I didn’t intend that, but now I know what I did wrong. (Yes, it would help enormously to read the manual BEFORE fooling around with things you don’t understand.)
My question: is it possible to put the genie back in the bottle, i.e., to get these messages (nearly 5000) back into an mbox file, either in EF or back in Apple Mail so I can start over again? (They no longer exist in Apple Mail. When I thought I’d gotten them correctly into EF, I deleted them from Mail and emptied the trash.)