Gmail

1. Open Gmail: Log in to your Gmail account.
2. Go to Settings: Click the gear icon in the upper-right corner and select "See all settings."
3. Create a Filter:
   • Go to the "Filters and Blocked Addresses" tab.
   • Click "Create a new filter."
4. Enter Email Address: In the "From" field, enter the email address you want to whitelist.
5. Create Filter: Click "Create filter."
6. Choose Action: Check the box "Never send it to Spam."
7. Save Filter: Click "Create filter" again to save.