Methodology
Every deliverability number on this site comes from our own controlled inbox placement tests. These pages document exactly how those tests work — the protocol, the formula, the bands, and what we do when we get something wrong.
- How we test email deliverability/how-we-test
The short version of our seed-list placement protocol. The full methodology ships with test cycle 0.
- Review standards: the gates every page must clear/review-standards
The hygiene rules and pre-publish gates, published verbatim — including what we don't promise.
- Sources: what we trust, for what, and where we've been burned/sources
Our source hierarchy, cross-verification rules, and a public list of our own documented failure modes.