Warming a domain on real bizop content: Postmaster crashed, delivery didn't, and the test still wasn't clean enough to be conclusive
Google Postmaster Tools graded a domain LOW → MEDIUM → LOW → BAD across three weeks. In the same window, our Gmail acceptance rate held above 99.9%. Here is what the data actually says, why it's more decoupled than you'd expect, and why we still don't feel we've earned a real answer.