In DA go to "SpamAssassin Setup" and set the level at which you want to tag emails with *****SPAM*****, and the level at which you want to delete emails.
7.5 and 15 are moderate, 5 and 10 will catch a bit more junk but may (unlikely) tag genuine emails.
If you want to get rid of most spam and to not see possible spam tagged *****SPAM***** then set both levels (the tag level and the delete level) to the same number - I would suggest 10 or 15 approx.
Hope that points you in the right direction!