How can I set all mailboxes to delete incoming spam

[Xsigns]

After a migration from my Plesk 10.1 Server to my new 10.4.4 Server almost all mailboxes are set to add *** SPAM *** in subject but not to delete spam mails. I want to delete incoming spam. How can I set it for all mailboxes? Unfortunately there isn't a separate column like 'delete spam' in a spamfilter table or elsewhere. There is only a 'delete' row with spamid etc.in spamfilter_prefs table. How can I add that row for the not-spam-deleting mailboxes?
Thanks in advance, Andre

 

[EgidijusS]

Maybe this helps you. This is mailbox preferences. See attached screen.