If StageSource E-Newsletters is filtered, from the spambox,
click on the white "W" icon on the left column of the mailing. 
When the pop-up window comes up, simply click the Add to Whitelist button.

Alternative whitelisting methods: 
* Click on the White List button.
   Add: listserver@stagesource.org to the bottom of your existing list. 
   Click the Submit List button.
* Click the Subject White List button.
   Add:  [StageSource] to the bottom of the list on a line by itself.
   Click the Submit List button.