Option #1
1. Open the email.
2. Right-click the sender's email address.
3. Click "add to contacts" in the short-cut menu.
4. Click "save and close."

Or Follow These Steps (Option #2)

Click right on your email you received from us
Choose Junk Email (see illustration)
Select Add Senders Domain.... to Safe Senders List
to add; Ballys Casino to your safe sender list.