code: public void deleteAll(String server) throws MailosaurException {
      	HashMap<String, String> query = new HashMap<String, String>();
      	query.put("server", server);
      	client.request("DELETE", "api/messages", query);
      }
docs: Delete all messages.
  Permanently deletes all messages held by the specified server. This operation cannot be undone. Also deletes any attachments related to each message.
  
  @param server The identifier of the server to be emptied.
  @throws MailosaurException thrown if the request is rejected by server