The SpamAssassin is an anti-spam tool which helps to filter unwanted messages. The SpamAssassin works for all the email accounts in your cPanel. It can be set to mark spam messages so that they can be noticed easily. You can also choose configureSpamAssassin to automatically delete any emails that are marked as spam. To set the minimum score for marking email messages as spam for the Plesk server to 5, use the following command,
Command:
spamassassin.exe -update-server -hits 5