Welcome

Outlook.com Smart Network Data Services


Deliverability to Outlook.com is based on your reputation. The Outlook.com Smart Network Data Services (SNDS) gives you the data you need to understand and improve your reputation at Outlook.com. But just looking at the data isn't enough! Maintaining a good reputation is a lot of work. You should use this data to keep your mailing lists clean and to monitor the IPs you control for unusual behavior. Reputation is always the responsibility of the sender. SNDS gives senders access to detailed data about individual IPs, and it also includes our Junk Email Reporting Program, which lets you receive reports when users junk your messages. Now you can view IP data and manage feedback loop settings from one convenient website.

Announcements

Last updated: September 22, 2026

  • Welcome to the new SNDS portal. This site is replacing the previous site at https://sendersupport.olc.protection.outlook.com/snds/
  • We're aware that the 'Deadline date' shown in the first network reattestation reminder email is inaccurate. This is the first of three reminders, sent approximately three months after networks were migrated to the new site. As previously announced, network access expires 10 months after approval or migration, a security measure introduced to prevent indefinite access without periodic ownership reattestation. We're working to correct the date shown in future emails and apologize for any confusion.

Getting started


To access SNDS, please log in with a Microsoft Account and then request access to the IPs for which you are responsible. You'll be taken through a simple authorization process, and then you'll soon have access to a wealth of information about those IPs.

Help! I have a problem sending mail to Outlook.com


Building & maintaining good reputation is a long-term proposition. The data on this site can help you do that, but if you have an urgent deliverability issue please have the person most familiar with the issue and your email infrastructure contact sender support.

Other Benefits


SNDS is useful for far more than just monitoring email reputation. It can help IP owners to detect compromised servers, malware, viruses, and botnets. We help network administrators detect these problems so that they can clean them up and make the internet a safer place.