BlueMail displays all IMAP folders from your account exactly as they are organized on your Provider's Server.
If you notice a missing folder in BlueMail that is present on your Provider's Server, it may require enabling for IMAP access.
For guidance on this, see how to enable Gmail's Labels/Folders for IMAP.
BlueMail has no rules of its own for sorting mail by subject, body text or sender domain into particular folders. Its sender-level controls are the Block List and the Spam Filter. For conditional rules like those, use your provider's webmail — they run on the server, before BlueMail sees the message, and BlueMail then shows whichever folder the mail landed in. See Auto-forwarding emails for the same point about forwarding.
