In order to mark us as a Safe Sender in Apple Mail, you will need to add us to your Contacts:
1. Open the Address Book from the Launchpad, Dock, or Applications Folder.
2. Click the + symbol below the contact list.
3. Enter our name (BetRivers) and email (firstname.lastname@example.org).
4. Finish by selecting 'Done', choosing 'Save' from the File Menu, or pressing Command+S on a MAC.