iter = tny_list_create_iterator (header_list);
header = TNY_HEADER (tny_iterator_get_current (iter));
folder = tny_header_get_folder (header);
iter = tny_list_create_iterator (header_list);
header = TNY_HEADER (tny_iterator_get_current (iter));
folder = tny_header_get_folder (header);