What is reputation crowd-sourcing?

Reputation crowd-sourcing aggregates feedback from multiple sources to assess sender trustworthiness. Rather than any single arbiter deciding reputation, distributed input creates more robust assessment.

Sources include: **MBP** engagement data, spam complaints, **spam trap** hits, blocklist status, validation results, and certification status. Aggregating these signals provides fuller picture than any single metric.

Benefits include: harder to game (must satisfy multiple independent systems), more representative (diverse perspective sources), and more resilient (no single point of failure). The ecosystem's distributed reputation approach explains why good practices must work across many dimensions simultaneously.