A Plesk installation normally uses Dovecot, Postfix, SpamAssassin and Roundcube to provide your users with a complete mail stack. Regular tests shipped with SpamAssassin of course detect spam, and can mark it as such or even move the spam out of the user’s INBOX.
But what happens with the spam that goes undetected? What happens with the mail incorrectly identified as spam? How do your users let the system know what’s what?
Using Plesk Premium Email, your users’ ability to make the system learn about spam and ham greatly improves. This article outlines the functionality of integration between Plesk Premium Email, Dovecot, Spamassassin and it’s Bayes algorithms.