MSN helps keep junk email out of your Inbox by using powerful filters. MSN Mail automatically rates potential junk email messages based on how closely they match known junk email formats. These junk email ratings are:
Very high: The message is probably junk email.
High: The message has many attributes of junk email.
Medium: The message may be junk email.
Low: The message is probably not junk email but is from an unknown sender.
Safe: The message is from someone in your address book or safe list, or from a sender authorized by MSN.
In addition to these automatic ratings, you can choose the level of filtering used on your incoming email messages, add people to a safe list or blocked senders list, and set up custom filters. You can train the junk email filter to recognize junk email, which helps to further reduce the junk email you receive.
The combination of the MSN automatic ratings and the filtering you set up helps ensure that junk email gets sent to the correct folder. The more you train your junk email filter, the better it becomes at recognizing junk email.