Is Gmail Postmaster reputation everything?

**Postmaster Tools** provides valuable but incomplete information. It shows domain and **IP reputation** for **Gmail** specifically, but doesn't cover other mailbox providers, doesn't explain why reputation changed, and doesn't show all the signals affecting your placement.

What Postmaster shows: reputation category (high, medium, low, bad), spam rate, authentication success, encryption status, and delivery errors. This is directional guidance, not complete diagnostic information.

What's missing: specific recipient complaints, engagement quality by segment, reputation at **Microsoft**/**Yahoo**/others, and detailed filter triggers. Supplement Postmaster with engagement analytics, complaint monitoring, **seed testing**, and cross-provider reputation services for comprehensive visibility.