What is a certification body (e.g., CSA)?

A certification body evaluates senders and grants approval to bypass some filtering thresholds at participating mailbox providers. The Certified Senders Alliance is the most well known in Europe, and Validity Certification (formerly Return Path Certification) dominates North America. certification is a paid service that provides “reputational lift” and smoother inbox placement at providers like Outlook.com and Yahoo\!. It is the official charter granting a vessel trusted access to priority docking lanes.