To help reduce the negative impact of junk e-mail, Windows Live Hotmail uses SmartScreen technology to provide junk e-mail protection and help identify and separate junk e-mail from legitimate e-mail. The SmartScreen content filter learns from known spam threats and from information provided by Windows Live Hotmail customers who are part of the voluntary Feedback Loop Program (FBL).When an external user sends an e-mail message to Windows Live Hotmail, SmartScreen evaluates the textual content of the message and assigns a rating based on the probability that the message is junk e-mail. This rating is stored within the message itself as a message property called a spam confidence level (SCL). Anti-phishing protection is also part of the patented technology. SmartScreen analyzes e-mail messages to help detect fraudulent links and spoofed domains. If a phishing indicator is detected, Windows Live Hotmail warns you to help protect you from these types of online threats.
Windows Live Hotmail handles e-mail messages by using rules that are based on a threshold SCL rating. If a message has an SCL rating that is higher than the threshold—that is, the message is believed to be spam—the message is deleted instead of being sent to your junk e-mail folder. If the message has a lower SCL rating, the e-mail is delivered to your junk e-mail folder rather than to your inbox.
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