TnyHeader *header = tny_msg_get_header (TNY_MSG (mime_part));
if (TNY_IS_HEADER (header)) {
filename = g_strdup (tny_header_get_subject (header));
TnyHeader *header = tny_msg_get_header (TNY_MSG (mime_part));
if (TNY_IS_HEADER (header)) {
filename = g_strdup (tny_header_get_subject (header));