APRF Explained: The New Email Deliverability Feedback Standard (and How to Collect Reports Today)
APRF (Aggregate Performance Reporting) is a new IETF deliverability-feedback proposal. Here's what APRF is, how the DKIM-based TXT record and JSON reports work, how SDI segmentation works, how to analyze inbox/unwanted/positive/negative metrics, why the industry needs it now that Gmail Postmaster Tools dropped reputation, and how Postmaster+ generates your record and aggregates the data.