Additional user cannot manage Plesk Email Security individual settings: Access denied

Symptoms

• Accessing Domains > example.com > Mail > Mail Addresses > john.doe@example.com > Settings under additional Plesk user shows the error:

  PLESK_ERROR: Access Denied

Cause

Plesk Email Security extension bugs EXTCERT-2884 and EXTPLESK-4120 that have been fixed.

Resolution

Update the Plesk Email Security extension to the latest version.