What’s the difference between IP vs domain reputation in SNDS?

Microsoft SNDS primarily reports IP reputation rather than domain reputation. This reflects Microsoft's filtering philosophy, which still gives significant weight to infrastructure signals.

The traffic light indicators, complaint rates, and spam trap data all tie to specific IP addresses. If you send from multiple IPs, each has its own SNDS profile.

Microsoft does track domain reputation internally, but SNDS does not expose this data directly. Domain signals influence SmartScreen filtering alongside IP data.

This IP-centric view means shared IP senders may see data influenced by other customers' behavior. Dedicated IP users see data reflecting only their own sending.

SNDS inspects ships rather than flags. Microsoft cares about both, but their public reporting system focuses on the vessel's registration rather than the company's banner.