¿Cuáles son los nombres de las carpetas especiales predeterminadas para las cuentas IMAP en Mail.app (como Borradores, Desechos, Enviados)?

Creé una cuenta IMAP vacía y la agregué a Mail.app y Notes.app en mi Mac con OS X Mountain Lion. Después de guardar algunos mensajes, todas las carpetas predeterminadas fueron creadas por Mail.app. Luego me conecté al servidor IMAP usando Terminal y enumeré todas las carpetas:

A1 LIST "" "%"
* LIST (\HasNoChildren) "." "Sent Messages"
* LIST (\HasNoChildren) "." "Junk"
* LIST (\HasNoChildren) "." "Archive"
* LIST (\HasNoChildren) "." "Deleted Messages"
* LIST (\HasNoChildren) "." "Notes"
* LIST (\HasNoChildren) "." "Drafts"
* LIST (\HasNoChildren) "." "INBOX"
A1 OK List completed.

Como puede ver en la salida en bruto, los nombres de carpeta predeterminados exactos son los siguientes:

• INBOX
• Borradores
• Mensajes enviados
• basura
• mensajes eliminados
• archivo
• Notas

Después de actualizar mi servidor de correo electrónico para crear estas carpetas para nuevas cuentas IMAP de forma predeterminada, conecté una nueva cuenta a mi Mac. Como se esperaba, Mail.app y Mail en iOS usaron automáticamente estas carpetas especiales (solo tuve que habilitar "Almacenar mensajes no deseados en el servidor" en Mac).

También para los que usan Dovecot, este es el archivo de configuración resultante con las carpetas predeterminadas incluidas ( /etc/dovecot/conf.d/15-mailboxes.conf ):

namespace inbox {
  mailbox Drafts {
    auto = subscribe
    special_use = \Drafts
  }

  mailbox "Sent Messages" {
    auto = subscribe
    special_use = \Sent
  }

  mailbox Junk {
    auto = subscribe
    special_use = \Junk
  }

  mailbox "Deleted Messages" {
    auto = subscribe
    special_use = \Trash
  }

  mailbox Archive {
    auto = subscribe
    special_use = \Archive
  }

  mailbox Notes {
    auto = subscribe
  }
}

El Grupo de trabajo de ingeniería de Internet (IETF) define que en un RFC adecuado, el RFC 6154 . Allí encontrará una lista de denominaciones de buzones de uso especial:

   \All
      This mailbox presents all messages in the user's message store.
      Implementations MAY omit some messages, such as, perhaps, those
      in \Trash and \Junk.  When this special use is supported, it is
      almost certain to represent a virtual mailbox.

   \Archive
        This mailbox is used to archive messages.  The meaning of an
        "archival" mailbox is server-dependent; typically, it will be
        used to get messages out of the inbox, or otherwise keep them
        out of the user's way, while still making them accessible.

   \Drafts
        This mailbox is used to hold draft messages -- typically,
        messages that are being composed but have not yet been sent.  In
        some server implementations, this might be a virtual mailbox,
        containing messages from other mailboxes that are marked with
        the "\Draft" message flag.  Alternatively, this might just be
        advice that a client put drafts here.

   \Flagged
        This mailbox presents all messages marked in some way as
        "important".  When this special use is supported, it is likely
        to represent a virtual mailbox collecting messages (from other
        mailboxes) that are marked with the "\Flagged" message flag.

   \Junk
        This mailbox is where messages deemed to be junk mail are held.
        Some server implementations might put messages here
        automatically.  Alternatively, this might just be advice to a
        client-side spam filter.

   \Sent
        This mailbox is used to hold copies of messages that have been
        sent.  Some server implementations might put messages here
        automatically.  Alternatively, this might just be advice that a
        client save sent messages here.

   \Trash
        This mailbox is used to hold messages that have been deleted or
        marked for deletion.  In some server implementations, this might
        be a virtual mailbox, containing messages from other mailboxes
        that are marked with the "\Deleted" message flag.
        Alternatively, this might just be advice that a client that
        chooses not to use the IMAP "\Deleted" model should use this as
        its trash location.  In server implementations that strictly
        expect the IMAP "\Deleted" model, this special use is likely not
        to be supported.