Question
How to configure spam score and spam action for all mailboxes?
Answer
Install Plesk Email Security extension from Plesk Extensions Catalog. It will appear in Plesk > Tools & Settings > Plesk Email Security (under Mail).
Open the extension to complete the installation.
Once the installation is complete, switch to the Server Settings tab and adjust spam action according to your needs:
Save the changes.
Note: To apply the new settings to all existing mailboxes, on the Server Settings tab expand Advanced and click Reset under Reset spam policy.