message: returned check
diff: @@ -472,6 +472,7 @@ mod tests {
  let all_messages = download_messages(None, None, None).unwrap();
  let pending = download_messages(None, Some(vec!["MS-103".to_string()]), None).unwrap();
  assert_eq!(pending.len(), 1);
  + assert!(pending[0].msgs[0].decrypted_payload.is_some());
  let accepted = download_messages(None, Some(vec!["MS-104".to_string()]), None).unwrap();
  assert_eq!(accepted[0].msgs.len(), 2);
  let specific = download_messages(None, None, Some(vec![accepted[0].msgs[0].uid.clone()])).unwrap();
  