What is Return Path (Validity) reputation data?

Validity (which acquired Return Path) provides sender reputation data aggregated from multiple sources. Their Sender Score rates IP addresses on a 0-100 scale based on complaint rates, spam trap hits, and sending patterns.

Validity's data feeds their certification program and monitoring tools. High Sender Scores can qualify for certification benefits at participating MBPs. Low scores indicate deliverability risk requiring remediation.

Unlike blocklists (binary listed/not listed), Sender Score provides graduated reputation assessment. It's useful for benchmarking and trending but represents one view among many. Don't rely solely on Sender Score; cross-reference with Postmaster Tools and actual delivery metrics.