Smart Network Data Services (SNDS) and the Junk Mail Reporting Program (JMRP) are two services Outlook.com provides for email senders to receive feedback on their mail. SNDS provides an overview of your IP addresses, and shows relevant statistics like approximate inbox rate, complaint rate, and trap hits. JMRP lets you set up a feedback loop, so you can receive copies of messages Outlook.com users mark as junk.

• A free service to provide reports on junk email issues reported by Outlook.com users
• Returns the full message with headers of any email marked as "junk" or "phishing"
• Helps identify customer accounts or PCs that are being used to send junk email
• Enroll and typically start receiving feedback within as little as 72 hours