How to Whitelist Email Address in Direct Admin (Spam Assassin)
Login to Direct Admin console and click on your target domain.
Click on Spamassassin setup.

Scroll down and enter the full list of emails which you intended to whitelist as seen in the example below:

Press the Save button to finalize the latest changes.
Click on Spamassassin setup.

Scroll down and enter the full list of emails which you intended to whitelist as seen in the example below:

Press the Save button to finalize the latest changes.
Updated on: 09/03/2020
Thank you!