koff, on slow connections, should have options to retrieve before headers then attachments and use LIFO when retrieve messages
In case of slow connections and big number of emails (i.e. > 10000 items) KOFF should retrieve headers then attachments, so user can see the whole email list.
Currently I'm experience mailboxes with partially retrieved messages and with "holes" in email list (because it hasn't finished to update).
It seems that KOFF first retrieves last unreaded messages but then begins from the oldest message and goes backward to newest.