How does the new email service handle spam?
Microsoft provides and manages advanced spam and virus filtering using proprietary technologies. This includes SmartScreen and SenderID. SmartScreen technology learns to detect spam through user input. The Sender ID Framework is an e-mail authentication technology protocol that helps address the problem of spoofing and phishing by verifying the domain name from which e-mail messages are sent. Sender ID validates the origin of e-mail messages by verifying the IP address of the sender against the alleged owner of the sending domain. If you are using the Web interface, all email undergoes a virus check/scan. This does not apply if you are using a POP client.