Since there is such a variety of spam and junk, there is the ability to only let the spam through that may have barely missed the “cutoff” point and discard the rest. You can adjust the slider percentage to fine tune the amount.
Some examples of messages that may fall into this category are those from Facebook, Twitter, Apple, etc. If these messages are flagged as spam, you can now retrieve them up to a week.
Note: your child cannot see any messages in the Spam folder until you move them into their Inbox.