If you are sure that the necessary message to be re-send is not spam, it is necessary to change its status for "Normal". In order to do that you can:
- change the status of the message in column "Status" (how to do that see here the user's guide);
- click "Not spam" in the panel of functional references of column "Messages";
- select the necessary message (or messages), and then make use of the function "Not spam" in the drop-down menu "Group actions".
After that the message is available for re-sending and downloading.