I’m trying to archive mail from Postbox into EF. I’m following these instructions, dragging the IMAP mailboxes from the Finder into Eaglefiler. EF accepts the file and starts the import. But most of the time, say 90 %, the result is not a new mailbox in my library, but just a single file containing all mails in the folder.
Am I doing something wrong or are the mailbox files corrupt in some way?