Introduction
How can I whitelist and blacklist e-mail addresses in SpamAssassin as a cPanel user?
Procedure
In the Spam Filters interface, there is an advanced section that allows managing of the whitelist and blacklist for SpamAssassin.
Note: If you need to specify multiple e-mail addresses or domains to whitelist or blacklist they can be separated by a space.
More information on whitelisting and blacklisting is available here:
Spam Filters: Additional Configurations (For Advanced Users)