The Mail junk mail filters work pretty well out of the box, but you can get better spam recognition by making a few changes and telling the junk mail system which messages are correctly identified as spam and which ones aren't.
Ozi mail nke mail na-arụ ọrụ nke ọma site na igbe ahụ, ma ị nwere ike ịnweta nkwalite spam kachasị mma na naanị ole na ole tweaks na ntọala, na ihe nkasi obi site n'ịgwa usoro ozi ederede nke ozi ziri ezi dị ka spam na nke ndị abụghị.