Legacy Google Postmaster Tools is going away — and reputation dashboards with it

The long-postponed retirement of Google Postmaster Tools' legacy interface now appears to be actually happening. As Al Iverson reported on Spam Resource on August 20, 2026, senders are progressively losing access to Postmaster Tools v1, with many reporting they can now reach only v2. Google originally set an October 31, 2025 retirement date, then postponed it without naming a new one; its deprecation notice states users will be automatically redirected to the new interface, and that most v1 dashboards carry over — with one deliberate exception.

What disappears

The IP reputation and domain reputation dashboards — the panels that rated a sender bad, low, medium or high — are being retired and have no equivalent in v2. Google's stated reasoning in its deprecation documentation: reputation data is hard for senders to act on, changes surface slowly, and reputation is only one of many factors in delivery decisions. In their place, v2 centers the Compliance status dashboard and the recently added Deliverability analysis section, which issues plain-language verdicts based on how Gmail users respond to a domain's mail, plus new API endpoints for compliance status and domain management.

What senders should do

For deliverability teams, the loss is real: the v1 reputation trend line was a widely used, if coarse, way to demonstrate that remediation work was moving domain reputation in the right direction. Its replacement measures something different — guideline compliance and user response rather than an abstract reputation grade — so historical comparisons break at the cutover.

The practical moves are straightforward. Confirm your domains are verified in v2 before v1 access disappears, because nothing migrates itself. Wire monitoring to the v2 API rather than screen-scraping the old dashboards. And treat the compliance panel as the source of truth for Gmail's sender requirements — spam-rate thresholds, authentication, one-click unsubscribe — since a red mark there is now the clearest signal Gmail provides. Where reputation trend data used to answer "is it getting better?", the closest v2 equivalents are the deliverability verdicts and your own complaint rate curve.